Merriam-Webster's Word of the Day for November 5, 2025 is:
lout • \LOUT\ • noun
A lout is an awkward brutish person.
// It was difficult for us to focus on the movie due to the noise coming from the group of louts seated in front of us.
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Examples:
“Fortunately for Vince, Jake is about to sell their mother’s house, and the proceeds should cover his deep debts. As is often the case with ne’er-do-wells, however, Vince doesn’t make anything easy, and [actor Jason] Bateman casts him as an arrogant lout ... who’s always playing the angles to his own benefit, damn the damage he causes to everyone else.” — Nick Schager, The Daily Beast, 18 Sept. 2025
Did you know?
Lout belongs to a large group of words that we use to indicate a particular sort of offensive and insensitive person, that group also including such terms as boor, oaf, jerk, and churl. English speakers have used lout in this way since the mid-1500s. Well before the 12th century, however, lout functioned as a verb with the meaning “to bow in respect.” No one is quite sure how—or even if—the verb sense developed into a noun meaning “an awkward brutish person.” The noun could have been coined independently, but if its source was the verb, perhaps the awkward posture of one bowing down led over the centuries to the idea that the bowing person was base and awkward as well.
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spontaneous
Merriam-Webster's Word of the Day for November 4, 2025 is:
spontaneous • \spahn-TAY-nee-us\ • adjective
Spontaneous describes something that is done or said in a natural and often sudden way and without a lot of thought or planning. It can describe a person who does things that have not been planned but that seem enjoyable and worth doing at a particular time.
// The kitten captured our hearts, and we made the spontaneous decision to adopt.
// He's a fun and spontaneous guy, always ready for the next big adventure.
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Examples:
"The Harlem Renaissance was filled with poetry and song—and with performance, as enshrined in [filmmaker William] Greaves's footage which features many spontaneous, thrillingly theatrical recitations of poems by Bontemps, Hughes, Cullen, and McKay." — Richard Brody, The New Yorker, 23 Sept. 2025
Did you know?
When English philosopher Thomas Hobbes penned his 1654 treatise Of Libertie and Necessitie he included the following: "all voluntary actions … are called also spontaneous, and said to be done by a man's own accord." Hobbes was writing in English, but he knew Latin perfectly well too, including the source of spontaneous; the word comes (via Late Latin spontāneus, meaning "voluntary, unconstrained") from the Latin sponte, meaning "of one's free will, voluntarily." In modern use, the word spontaneous is frequently heard in more mundane settings, where it often describes what is done or said without a lot of thought or planning.
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fidelity
Merriam-Webster's Word of the Day for November 3, 2025 is:
fidelity • \fuh-DELL-uh-tee\ • noun
Fidelity is the quality or state of being faithful to a person, such as a partner or spouse, or a thing, such as one’s country. Fidelity can also refer to accuracy or exactness in details, or the degree to which an electronic device (such as a television) accurately reproduces its effect (such as sound or picture).
// After almost three decades on the job, no one can doubt their fidelity to the company.
// The movie’s director insisted on total fidelity to the book.
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Examples:
“The origins of the role [of ring bearer] actually have their roots in ancient Egypt, where a young boy would be enlisted to carry rings to a couple as a symbol of love, fidelity, and fertility.” — Shelby Wax, Vogue, 10 July 2025
Did you know?
Fidelity came to English by way of Middle French in the 15th century, and can ultimately be traced back to the Latin adjective fidēlis, meaning “faithful, loyal, trustworthy.” While fidelity was originally exclusively about loyalty, it has for centuries also been used to refer to accuracy, as in “questions about the fidelity of the translation.” Nowadays fidelity is often used in reference to recording and broadcast devices, conveying the idea that a broadcast or recording is “faithful” to the live sound or picture that it reproduces.
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arbitrary
Merriam-Webster's Word of the Day for November 2, 2025 is:
arbitrary • \AHR-buh-trair-ee\ • adjective
Arbitrary describes something that is not planned or chosen for a particular reason, is not based on reason or evidence, or is done without concern for what is fair or right.
// Because the committee wasn’t transparent about the selection process, the results of the process appeared to be wholly arbitrary.
// An arbitrary number will be assigned to each participant.
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Examples:
“The authority of the crown, contemporaries believed, was instituted by God to rule the kingdom and its people. England’s sovereign was required to be both a warrior and a judge, to protect the realm from external attack and internal anarchy. To depose the king, therefore, was to risk everything—worldly security and immortal soul—by challenging the order of God’s creation. Such devastatingly radical action could never be justified unless kingship became tyranny: rule by arbitrary will rather than law, threatening the interests of kingdom and people instead of defending them.” — Helen Castor, The Eagle and the Hart: The Tragedy of Richard II and Henry IV, 2024
Did you know?
Donning black robes and a powdered wig to learn about arbitrary might seem to be an arbitrary—that is, random or capricious—choice, but it would in fact jibe with the word’s etymology. Arbitrary comes from the Latin noun arbiter, which means “judge” and is the source of the English word arbiter, also meaning “judge.” In English, arbitrary first meant “depending upon choice or discretion” and was specifically used to indicate the sort of decision (as for punishment) left up to the expert determination of a judge rather than defined by law. Today, it can also be used for anything determined by or as if by chance or whim.
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ostracize
Merriam-Webster's Word of the Day for November 1, 2025 is:
ostracize • \AH-struh-syze\ • verb
To ostracize someone is to exclude them from a group by the agreement of the group's members.
// She was ostracized by her community after refusing to sign the petition.
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Examples:
"Telling stories with affection and noodging, [comedian Sarah] Silverman has always been encouraged by her family, who embraced rather than ostracized her for revealing family secrets on the way to reaping howls of laughter." — Thelma Adams, The Boston Globe, 19 May 2025
Did you know?
In ancient Greece, citizens whose power or influence threatened the stability of the state could be exiled by a practice involving voters writing that person's name down on a potsherd—a fragment of earthenware or pottery. Those receiving enough votes would then be subject to temporary exile from the state. Ostracize comes from the Greek verb ostrakízein (itself from the noun óstrakon meaning "potsherd"), used in 5th century Athens for the action of banishing someone by way of such a vote. Someone ostracized today is not exiled, but instead is excluded from a group by the agreement of the group's members.
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