unfit
Definitions
Not of the necessary quality, standard, or type to meet a particular purpose.
Not in good physical or mental health.
Not suitable or appropriate for a particular situation or role.
Examples
The building was declared unfit for human habitation due to severe structural damage.
He felt physically unfit after months of neglecting his exercise routine.
The candidate was deemed unfit for the position because he lacked the necessary leadership skills.
Synonyms
inappropriate unsuitable incompetent unqualified incapable unprepared unhealthy