Impossible to do or carry out:
That has or have previously been owned by someone else.
Without worth or merit; useless, valueless, etc.
not capable of being used
Not workable or useful; impracticable
The definition of ineffectual is not productive or not working correctly.
Lacking in utility or serviceability; not useful.
Find another word for unusable. In this page you can discover 19 synonyms, antonyms, idiomatic expressions, and related words for unusable, like: impracticable, used, worthless, unuseable, unserviceable, useless, inoperative, impractical, unnegotiable, ineffectual and inutile.