Merriam-Webster's Word of the Day for March 16, 2026 is:

putative • \PYOO-tuh-tiv\  • adjective

Putative is a formal word used to describe something that is generally believed, supposed, or assumed to be something specified. It is always used before a noun.

// The group's putative leader was conspicuously absent from the meeting.

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Examples:

"... the painting is swept up in questions of identity, provenance, authenticity and putative value." — Manohla Dargis, The New York Times, 31 Oct. 2025

Did you know?

There's no need to make assumptions about the root behind putative—we know it comes from a form of the Latin verb putare, which means "to consider" or "to think." Putative is a rather formal word that has been part of English since the 15th century. Like apparent, presumed, and ostensible, it leaves room for a smidgen of doubt: a putative ally will very probably be there for you, and a putative successor is very likely to be the next one in charge, but life offers no guarantees in either case.

Merriam-Webster's Word of the Day for March 15, 2026 is:

tranche • \TRAHNSH\  • noun

Tranche refers to a division or portion of a whole.

// A tranche of leaked documents was delivered to the newspaper anonymously, with more promised to come.

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Examples:

“Congress approved an initial tranche of funding legislation in November as the longest shutdown in history came to an end.” — Kaia Hubbard, CBS News, 16 Dec. 2025

Did you know?

In French, tranche means “slice.” Cutting deeper into the word’s etymology, we find the Old French word trenchier, meaning “to cut,” which has its likely origin in a Latin word meaning “to cut in three,” from Latin trini meaning “three each.” Tranche emerged in the English language in the late 19th century to refer to a division or portion of a larger pool or whole, and later developed a finance-specific meaning referring to an offering for sale of typically a set of bonds “cut” from a larger group of bonds, the tranche being differentiated by such factors as maturity or rate of return.

Merriam-Webster's Word of the Day for March 14, 2026 is:

rash • \RASH\  • adjective

Rash describes something done or made quickly and without thought about what will happen as a result. It can also describe someone who is doing something rash.

// I later regretted having made such a rash promise in a moment of chaos.

// Don't be rash about this decision. Take your time.

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Examples:

“The climactic scenes toy with the blurred lines between hallucination and reality, but the logic falls apart; threads like Hana’s rash decision to undertake a dangerous surgical fix virtually evaporate without much payoff.” — David Rooney, The Hollywood Reporter, 3 Feb. 2026

Did you know?

Is it possible that the origins of the noun rash (referring to a group of red spots on the skin that is caused by an illness or a reaction to something) and the adjective rash (meaning “overly hasty”) are the same? Not so fast! Like many homonyms—“two or more words spelled and pronounced alike but different in meaning”—the two rashes have distinct sources. The noun rash, which first appeared in English in the late 17th century, probably comes ultimately from the Latin verb rādere, meaning “to scrape, scratch, shave.” The adjective rash appears to be about two centuries older, and comes from a Middle English word rasch meaning “active, quick, eager.”

Merriam-Webster's Word of the Day for March 13, 2026 is:

immure • \ih-MYOOR\  • verb

To immure something is to enclose it within or as if within walls. Immure is also sometimes used synonymously with imprison.

// Scientists at the research station in Antarctica are immured by the frozen wild that surrounds them.

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Examples:

"The Torlonia collection, which Alessandro Torlonia moved into a private museum in Rome in 1875, went into hiding in the early 1940s. ... Disputes among family members and with the government left the marbles hidden away, gathering dust and grime. For all those years scholars had to beg and bribe to get in. One government official, desperate to see what gems the Torlonia prince had immured, resorted to dressing up as a cleaner." — Jason Farago, The New York Times, 16 Apr. 2025

Did you know?

Like mural, immure comes from murus, a Latin noun meaning "wall." Immure came to English by way of the Medieval Latin verb immurare, formed from murus and the prefix in- (meaning "in" or "within"). Immure, which first appeared in English in the late 16th century, literally means "to wall in" or "to enclose with a wall," but it has extended meanings as well. In addition to senses meaning "to imprison" and "to entomb," the word sometimes has broader applications, essentially meaning "to shut in" or "to confine." One might remark, for example, that a very studious acquaintance spends most of her time "immured in the library."

Merriam-Webster's Word of the Day for March 12, 2026 is:

gambit • \GAM-bit\  • noun

A gambit is something done or said in order to gain an advantage or to produce a desired effect.

// The workers’ opening gambit in the negotiations was to demand a wage hike.

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Examples:

“Now the book publishing industry has sent a message to all A.I. companies: Our intellectual property isn’t yours for the taking, and you cannot act with impunity. This settlement is an opening gambit in a critical battle that will be waged for years to come.” — Andrea Bartz, The New York Times, 1 Oct. 2025

Did you know?

Don’t let the similarities of sound and general flavor between gambit and gamble trip you up; the two words are unrelated. Gambit first appeared in English in a 1656 chess handbook that was said to feature almost a hundred illustrated gambetts. Gambett traces back first to the Spanish word gambito, and before that to the Italian gambetto, from gamba meaning “leg.” Gambetto referred to the act of tripping someone, as in wrestling, in order to gain an advantage. In chess, gambit (or gambett, as it was once spelled) originally referred to a chess opening whereby the bishop’s pawn is intentionally sacrificed—or tripped—to gain an advantage in position. Gambit is now applied to many other chess openings, but after being pinned down for years, it also finally broke free of chess’s hold and is used generally to refer to any “move,” whether literal or rhetorical, done to get a leg up, so to speak. While such moves can be risky, gambit is not synonymous with gamble, which likely comes from Old English gamen, meaning “amusement, jest, pastime”—source too of game.

Merriam-Webster's Word of the Day for March 11, 2026 is:

besotted • \bih-SAH-tud\  • adjective

Someone described as besotted is so in love that they are unable to think clearly; they are utterly infatuated. Besotted can also be used as a synonym of drunk.

// The opening scene of the movie follows a besotted couple at a party, the camera’s focus emphasizing their ignorance of all that’s around them.

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Examples:

“Kathrin [tour guide] is endearingly besotted with her adopted country and spoke about it with the reverence of a convert. Some more things I heard from her that contribute to people in Finland being happy included: sauna culture discouraging fatphobia; emphasis on design—that means even very basic, cheap things are beautiful and robust; and, of course, nature.” — Imogen West-Knights, Slate, 27 Aug. 2025

Did you know?

Stumble on the word sot and you will likely find it attached to a person who tends to over-imbibe. The word has referred to a habitual drunkard since the late 16th century, and before that—from the days of Old English—it referred to a fool generally. The now-archaic verb sot followed a similar trajectory, its original meaning of “to cause to appear foolish” being joined later by its “to drink alcohol excessively” meaning. The earliest known recorded use of the related adjective besotted (in the late 16th century, from the the verb besot), however, described a state of figurative intoxication: one besotted was stupefied by love rather than liquor. The still-current sense of besotted meaning “drunk” didn’t show up until the early 19th century. In fact, evidence of the “infatuated” sense of besotted also predates the tipple-related senses of the noun sot, verb sot, and verb besot, suggesting perhaps that love may be the strongest intoxicant of all.

Merriam-Webster's Word of the Day for March 10, 2026 is:

mea culpa • \may-uh-KOOL-puh\  • noun

The noun mea culpa is used for a formal acknowledgment of personal fault or error.

// The podcast host's mea culpa did little to satisfy those who found the episode deeply offensive.

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Examples:

"... his apology was the best public mea culpa of this century. ... It was delivered without hesitation, qualification or blame shifting." — John Mosig, The Age (Melbourne, Australia), 24 Oct. 2025

Did you know?

Mea culpa means "through my fault" in Latin. Said by itself, it's an exclamation of apology or remorse that is used to mean "It was my fault" or "I apologize." Mea culpa is also a noun, however. A newspaper might issue a mea culpa for printing inaccurate information, or a politician might give a speech making mea culpas for past wrongdoings. Mea culpa is one of many English terms that come from the Latin culpa, meaning "guilt." Some other examples are culpable ("meriting condemnation or blame especially as wrong or harmful"), culprit ("one guilty of a crime or a fault"), and exculpate ("to clear from alleged fault or guilt").

Merriam-Webster's Word of the Day for March 9, 2026 is:

hector • \HEK-ter\  • verb

To hector someone is to criticize or question them in a threatening way.

// The judge ordered the attorney to stop hectoring the witness.

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Examples:

“He continued to hector Neal about his inattention to business (‘I have been waiting to hear from you,’ again, and again, and again), without any tangible results.” — Jem Aswad, Variety, 5 Aug. 2025

Did you know?

In Homer’s Iliad, Hector, the eldest son of King Priam of Troy, was a model soldier, son, father, and friend, the champion of the Trojan army until he was killed by the Greek hero Achilles. So how did his name become a verb meaning “to intimidate or harass”? That use was likely influenced by gangs of rowdy street toughs who roamed London in the 17th century and called themselves “Hectors.” They may have thought themselves gallant young blades (that’s sense 3b(3)), but to the general populace they were swaggering bullies who intimidated passersby and vandalized property.

Merriam-Webster's Word of the Day for March 8, 2026 is:

crepuscular • \krih-PUHSS-kyuh-ler\  • adjective

Crepuscular means “of, relating to, or resembling twilight.” It is used in zoological contexts to describe creatures that are active during twilight, or the activities of such creatures.

// As evening came on, fireflies began to appear in the crepuscular gloaming.

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Examples:

“To gaze upon a platypus is to witness a jumble of contradictions. … Even when you see one with your own eyes—say, paddling underwater, absorbed in her crepuscular rooting—the platypus (Ornithorhynchus anatinus) remains hard to believe.” — Kathleen Yale, Orion, Winter 2025/2026

Did you know?

The early Romans had two words for the twilight. Crepusculum was favored by Roman writers for the half-light of evening, just after the sun sets; diluculum was reserved for morning twilight, just before the sun rises—it is related to lūcidus, meaning “bright.” (Crepusculum was likely modeled on diluculum, from the assumed root krepos-, meaning “twilight.”) English speakers didn’t embrace either of these Latin nouns as substitutes for the word twilight, but they did form the adjective crepuscular in the 17th century. The word’s zoological sense, relating to animals that are most active at twilight, developed in the 19th century.

Merriam-Webster's Word of the Day for March 7, 2026 is:

libertine • \LIB-er-teen\  • noun

A libertine is in broad terms a person who is unrestrained by convention or morality. More narrowly, the word describes someone who leads an immoral life.

// The legend of Don Juan depicts him as a playboy and libertine.

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Examples:

"As horrifying as some of the sins of Victorian scholarship may have been, it would have been anathema to these students of classical philosophy to simply throw out Plato. But that's what some of their modern inheritors have tried to do. … It's worth noting that we might not have Plato's work at all, were it not carefully studied and preserved by the Islamic scholars (hardly libertines themselves) of the medieval period." — R. Bruce Anderson, The Ledger (Lakeland, Florida), 1 Feb. 2026

Did you know?

"I only ask to be free," says Mr. Skimpole in Charles Dickens' Bleak House. His words would undoubtedly have appealed to the world's first libertines. The word libertine comes from the Latin lībertīnus, a word used in early writings of Roman antiquity to describe a formerly enslaved person who had been set free (the Roman term for an emancipated person was the Latin lībertus). Middle English speakers used libertine to refer to a freedman, but by the late 1500s its meaning was extended to freethinkers, both religious and secular, and it later came to imply that an individual was a little too unrestrained, especially in moral affairs. The likely Latin root of libertine is līber, the ultimate source of our word liberty.