unsuitable

not meant or adapted for a particular purpose

• “a solvent unsuitable for use on wood surfaces”

not capable of being applied

• “rules inapplicable to day students”

not conducive to good moral development

• “the movie is unsuitable for children”

not worthy of being chosen (especially as a spouse)

not appropriate for a purpose or occasion

• “unsuitable attire for the office”
• “said all the wrong things”