Merriam-Webster's Word of the Day for July 17, 2026 is:

obdurate • \AHB-duh-rut\  • adjective

Obdurate is a formal word that means "resistant to persuasion." It is usually used to describe someone who is not willing to change their methods or opinions, or something that is not easily altered.

// Though obdurate problems loom, the organization under its new leadership is poised to make real and effective changes.

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Examples:

"... even great careers must end sometime, and as often as not against obdurate wills." — Greg Baum, The Sydney Morning Herald, 17 Dec. 2025

Did you know?

When trying to persuade someone who has an obdurate disposition, you may end up feeling rather dour about your ability to change their mind. To endure such encounters in the future, you may find that you need to be more durable and not let the person's mulishness get you down. Maybe you will find such situations less stressful if you can face them knowing that the words obdurate, dour, endure, and durable are etymological kissing cousins. All trace back to the Latin adjective durus, which means "hard."

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

bibelot • \BEE-buh-loh\  • noun

A bibelot is a small household ornament or decorative object.

// His grandfather set up a table every week at the flea market where he sold all sorts of bibelots and bric-a-brac, from ceramic figurines to tiny blown glass sculptures.

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Examples:

“One by one, the beads and baubles and charms and bibelots have been cleaned and polished and now they are being placed on shelves, in jars and containers, in bins, and in a bathtub in Beadniks’ new store on Main Street.” — Bob Audette, The Brattleboro (Vermont) Reformer, 21 June 2025

Did you know?

The English language, it would seem, can’t get enough of synonyms for trinket, including gewgaw, gimcrack, and knickknack, just as lovers of tchotchkes can’t get enough of such ornamental trifles. Lady Charlotte Guest (1812-1895) was just such a lover of baubles and bric-a-brac. Not only was Guest an accomplished linguist, educator, publisher, and philanthropist, she also amassed collections of everything from porcelain to playing cards, which she ultimately donated to museums. We also have Guest to thank for the first known use in English of the French word for “trinket,” bibelot, which she recorded in a journal entry in 1873 while in Paris: “After 3, walked up to Lady Hopetoun’s to amuse her with some of our little bibelots.”

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

loquacious • \loh-KWAY-shus\  • adjective

Loquacious means “liking to talk and talking smoothly and easily.” Someone described as loquacious might also be called wordy (prone to using more words than necessary) or garrulous (tending to talk a lot).

// We were entertained all afternoon by our host’s loquacious parrot and its nonstop script of favored phrases.

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Examples:

“Due to their loquacious nature, marmosets have recently become a focus of studies on the evolutionary origin of human speech and language.” — Tobias Kahland et al., Nature Communications, 28 Mar. 2026

Did you know?

Loquacious undeniably has a poetic ring to it. It’s been a favorite of the writerly sort since it made its first appearance in English in the 17th century and, with poetic license, writers stretched its meaning beyond “talkative,” and especially “excessively talkative,” to describe such things as the chattering of birds and the babbling of brooks. The ultimate source of all this chattiness is loquī, a Latin verb meaning “to talk, speak.” Other words descended from loquī include colloquial, eloquent, soliloquy, and ventriloquism.

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

yaw • \YAW\  • verb

The verb yaw when used for the action of a ship, aircraft, spacecraft, or projectile means "to move to the left or right especially in an uncontrolled manner." More broadly, yaw is used as a synonym of alternate to mean "to change from one to another repeatedly."

// The rogue wave hit the vessel, and the ship yawed hard to the right.

// The album yaws from soulful ballad to up-tempo pop hit and back again.

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Examples:

"The out-of-control motion radiated down to the spacecraft itself, which began yawing and pitching in response to the force." — Jeffrey Kluger, Time, 11 Nov. 2025

Did you know?

In the heyday of large sailing ships, numerous nautical words appeared on the horizon. Yaw is one such word. Its origin isn't exactly known, but it began turning up in print in the 16th century, first as a noun meaning "movement off course" or "side to side movement," and then as a verb. For centuries, it remained a sailing word—often alongside pitch ("to have the front end rise and fall")—with occasional extended use as a synonym of the verb alternate. When the era of airplane flight dawned, much of the vocabulary of sailing found new life in aeronautics, and "yawing" was no longer confined to the sea. Nowadays yaw, pitch, and roll are just as likely to be used by pilots and rocket scientists to describe the motion of their crafts.

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

implacable • \im-PLAK-uh-bul\  • adjective

Someone or something described as implacable is not capable of being appeased or changed.

// The project faced implacable resistance from community members, and is now off the table.

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Examples:

“Unlike, say, the globetrotting stories of Ian Fleming or John le Carré, in which victories only temporarily frustrate an implacable foe, [Agatha] Christie’s smaller worlds feel put right when the cover closes or credits roll.” — The Economist, 17 Jan. 2026

Did you know?

Implacable is rooted in the Latin verb placare, meaning “to soothe,” but its im- prefix is a variant of the negating prefix in- (as in inactive) and it signals that there’s nothing warm and fuzzy here. Someone or something described as implacable cannot be soothed, which usually means trouble: implacable is most often attached to words like foe, enemy, hatred and hostility. The opposite of implacable is, of course, placable; it means “easily soothed,” but sadly isn’t called upon very often. Another placare word is likely more familiar. Placate means “to soothe or appease”; it’s frequently applied when an angry person is made to feel less so.

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

fulcrum • \FULL-krum\  • noun

In technical use, fulcrum refers to the support on which a lever moves when it is used to lift something. In figurative use, fulcrum refers to a person or thing that makes it possible for something to function or develop, or in other words, one who plays an essential role in something.

// Although the lead actor was phenomenal, critics suggested that the supporting cast was the real fulcrum of the show.

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Examples:

“The moral fulcrum of Christopher Marlowe’s The Tragical History of the Life and Death of Doctor Faustus, in which a scholar gains knowledge and power through a demonic pact, is a relatively straightforward statement on the human condition.” — Eric Olson, Literary Hub, 14 Jan. 2026

Did you know?

The Latin word fulcrum, which refers to the head or back support of a couch, comes from the verb fulcīre, which means “to prop, support.” When fulcrum was first used in English in the 17th century, it referred to the point on which a lever or similar device (such as the oar of a boat) is supported. The literal use easily supported figurative use, and it didn’t take long for the word to develop a meaning referring to one deemed essential to the function or development of something. Despite fulcrum’s multiple senses, the word's meanings have kept a steady theme. In zoology, fulcrum refers to a part of an animal that serves as a hinge or support, such as the joint supporting a bird’s wing.

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

xeric • \ZEER-ik\  • adjective

Xeric means "characterized by, relating to, or requiring only a small amount of moisture."

// She is a botanist who primarily studies xeric plants.

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Examples:

"Thoughtfully designed xeric, or low-water, landscapes can be dynamic, layered and full of color. Native plants and those adapted to the Intermountain West ... provide habitat and food for pollinators and birds while needing a fraction of the water that bluegrass demands." — Pula Davis and Scott Curry, The Colorado Springs Gazette, 16 May 2026

Did you know?

Few English words begin with the letter X, but of those that do, a number come from the Greek xēros, meaning "dry." Around the turn of the 20th century, botanists were using the terms xerophyte and xerophytic for plants that were well adapted to survive without much water. But when seeking a more generic word that included both animals and plants, they came up, ahem, dry. In a 1926 issue of Ecology, specialists proposed using xeric as a more generalized term for either flora or fauna. They further suggested that xerophytic, among other terms, "be entirely abandoned as useless and misleading." Not everyone liked the idea. In fact, the Ecological Society of America stated that xeric was "not desirable," preferring terms such as arid. Others declared that the word should refer only to habitats, not to organisms. Enough scientists used it anyway, however, that by the 1940s xeric was well documented in scientific literature.

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

effulgence • \ih-FULL-junss\  • noun

Effulgence means “radiant splendor” or “brilliance.”

// Guests oohed and aahed at the sudden effulgence of the pagoda, as the last of its hundreds of candles were finally lit.

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Examples:

“No one knows who suggested that the building be lit at night. But the obvious inspiration was Times Square, an area famous for its nighttime effulgence.” — Robert Sharoff, FastCompany.com, 7 July 2025

Did you know?

Need a shiny word to bust out at your next disco party, planetarium visit, or fireworks gathering? How about effulgence? It’s not a shiny “new” word, having made its English language debut in the 17th century, but it’s unusual and has a lovely Latin pedigree: the verb fulgēre, meaning “to shine.” Effulgence isn’t used for bog-standard brightness, however; it’s reserved for shininess that dazzles, inspires, leaves you gobsmacked—in other words, “radiant splendor.”

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

tacit • \TASS-it\  • adjective

Tacit is a formal adjective used to describe something that is expressed or understood without being directly stated.

// As roommates, we had a tacit agreement that we would never pry into each other’s affairs.

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Examples:

“Where modern documentaries are slick productions filled with preconceived notions, embedded narratives, and tacit approval of their subjects, [Frederick] Wiseman’s work is slow, contemplative, and refreshingly slant-free.” — Kevin Slane, Boston.com, 24 Feb. 2026

Did you know?

In the first chapter of Emily Brontë’s Wuthering Heights, the narrator Mr. Lockwood recounts warily encountering three dogs. Although he was sure to sit still, he admits that “imagining they would scarcely understand tacit insults, I unfortunately indulged in winking and making faces at the trio” (one subsequently leapt onto his knees in fury). His tacit insults were, by the relevant definition of tacit, not expressed with words (instead he used facial expressions). Tacit can also mean “implied or indicated (as by an act or by silence) but not expressed,” as when a tacit agreement is understood without being directly stated, and tacit approval is silently granted. Tacit traces back to the Latin verb tacēre, meaning “to be silent,” which is also the ancestor of the English adjective taciturn, used to describe someone who tends to be quiet.

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

gambol • \GAM-bul\  • verb

Gambol means "to run or jump in a lively way." It is used as a synonym of frolic.

// There are few sights more charming than that of lambs gamboling about in a meadow in full flower.

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Examples:

"There's also charming footage of a couple gamboling in Central Park that might be some of the first scenes Warhol ever shot ... They're so lighthearted and playful, they're more in the spirit of his jaunty commercial drawings from the 1950s than of the deadpan Pop Art he was just then perfecting." — Blake Gopnik, The New York Times, 30 Jan. 2026

Did you know?

In Middle French, the noun gambade referred to the frisky spring of a jumping horse. In the early 1500s, its influence leapt into English twice, lending a playful bounce to both noun and verb forms of gambol. (The noun means "a skipping or leaping about in play.") Neither English word is restricted to horses, but rather can be used of any frolicsome creature. The more common of the two, the verb, suggests levity and spontaneity, and it tends to be used especially of the lively activity of children or animals engaged in active play.