unsuitable
Definitions
Not appropriate or fitting for a particular purpose, occasion, or person.
Not matching or in harmony with the requirements of a situation.
Examples
The heavy boots were completely unsuitable for the long hike through the desert.
His casual attire was deemed unsuitable for such a formal business meeting.
The building was found to be unsuitable for residential use due to structural concerns.
Synonyms
inappropriate unfit improper unbecoming inapt unqualified incongruous