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Definitions

unusable

ADJECTIVE
useless
Synonyms
STRONGEST
expendable futile idle impractical ineffective inoperative meaningless pointless unavailable unproductive unprofitable unworkable worthless
WEAK
abortive bootless counterproductive disadvantageous dysfunctional feckless fruitless good-for-nothing hopeless impracticable incompetent ineffectual inept inutile no good nonfunctional of no use profitless purposeless scrap stupid unavailing unfunctional unpurposed unusuable vain valueless waste weak
Antonyms
STRONGEST
beneficial effective fruitful important meaningful productive profitable sensible useful valuable worthwhile
ADJECTIVE
impracticable
Synonyms
STRONGEST
impractical inoperable unattainable unworkable useless
WEAK
abstract absurd chimerical idealistic illogical impossible improbable inapplicable inefficacious infeasible irrealizable ivory-tower no-go nonfunctional nonviable not a prayer otherworldly out of the question quixotic romantic speculative starry-eyed theoretical unbusinesslike unfeasible unnegotiable unreal unwise visionary wild won't fly

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.

The fire on Jan. 22, believed to have been set by a homeless person, took out wooden framing below an asphalt bridge connecting access to a parking lot, making it unusable for safety reasons.

From Los Angeles Times • Feb. 28, 2026

But the interruption lasted just 15 hours.The office was gutted and unusable; staff worked remotely.

From BBC • Feb. 25, 2026

This combination of heating and removal makes the gas unusable for forming new stars.

From Science Daily • Jan. 19, 2026

But burning continues and unusable waste is often dumped in empty lots, according to Vinh.

From Barron's • Dec. 16, 2025

Having rendered Rover 1 unusable, I'll have to use my mutant rover for the trip.

From "The Martian" by Andy Weir

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