Synonyms:
unsuitable
Meaning: not meant or adapted for a particular purpose; "a solvent unsuitable for use on wood surfaces"
Usage examples
Secondly, less strictly, a thing is said to be passive, when something, whether suitable or unsuitable, is taken away from it.
Ellen Terry's acting, the Royal Academy Exhibition, private theatricals, and twenty things besides, but they all seemed unsuitable subjects to start conversation with in this case.
In excuse for the too free exposing of his person, which seemed unsuitable in a secretary of state, he alleged, that it became him to be more active than other men in all hazardous enterprises, lest his impatience for peace might bear the imputation of cowardice or pusillanimity.