unusable

adjective

un·​us·​able ˌən-ˈyü-zə-bəl 

: not capable of being used or fit for use : not usable

unusable documentary footage

The lavatory, totally unusable, was full of snow which had blasted in through the keyhole.

—Katharine Sim

unusably

ˌən-ˈyü-zə-blē 

adverb

Synonyms of unusable

• useless
• impractical
• unsuitable

Examples of unusable in a Sentence

a completely unusable gadget that's just taking up space in the drawer

Recent Examples on the Web

Still, the lake remained just over a quarter full, and 15 of its 17 boat launches remained unusable as of Friday. — Wufei Yu, Los Angeles Times, 8 Nov. 2026

Some of the fleet’s older satellites suffered from atomic clock failures, rendering them partially or totally unusable. — Stephen Clark, ArsTechnica, 6 Nov. 2026

The move is meant to counter return scams and reduce unusable inventory, Bloomberg’s Mark Gurman reports. — Jibin Joseph, PC Magazine, 26 Oct. 2026

In healthcare and pharmaceutical supply chains, drug products become unusable after expiration dates are reached. — Santanu Boral, Forbes.com, 26 Oct. 2026

Word History

First Known Use

1825, in the meaning defined above

Rhymes for unusable

• fusible
• usable
• diffusible
• excusable
• infusible
• reusable
• inexcusable