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Definitions

unaccustomed

[uhn-uh-kuhs-tuhmd] / ˌʌn əˈkʌs təmd /
ADJECTIVE
not prepared, ready; new
Synonyms
STRONGEST
ignorant uninformed
WEAK
incompetent inexperienced newcome not given to not used to novice too green unacquainted unfamiliar with uninstructed unpracticed unseasoned unskilled untaught untrained unused to unversed in
Antonyms
WEAK
accustomed customary normal prepared ready usual
ADJECTIVE
new, strange
Synonyms
STRONGEST
unfamiliar
WEAK
alien altered bizarre different eccentric exceptional exotic foreign imported novel out of the ordinary outlandish quaint remarkable singular special surprising uncommon unconventional uncustomary unexpected unknown unorthodox unprecedented unusual unwonted variant
Antonyms
WEAK
accustomed customary normal prepared ready usual

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Breuer’s evangelizing has made him an important public figure in a country unaccustomed to seeing and hearing from men in uniform.

From The Wall Street Journal • Feb. 12, 2026

The 109% premium over Thursday’s closing price, and the nearly 1,000% premium over Cidara’s share price five months ago, are additional positive signs for biotech, which has been on an unaccustomed run this fall.

From Barron's • Nov. 14, 2025

He deploys a funky delivery that ends with him throwing the ball from high above his head, an arm slot opposing batters are unaccustomed to facing.

From The Wall Street Journal • Oct. 30, 2025

Syd, unaccustomed to elevators, let alone crowded ones, had to be pulled in, then splat like a cartoon character on the floor each time there was a shift down.

From Los Angeles Times • Aug. 11, 2025

I was as unaccustomed to praise as I was to having a friend, or being one.

From "The Shakespeare Stealer" by Gary L. Blackwood

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.