unsuitable

(s) not meant or adapted for a particular purpose
- a solvent unsuitable for use on wood surfaces
(s) not capable of being applied
- rules inapplicable to day students
inapplicable,
(s) not conducive to good moral development
- the movie is unsuitable for children
(s) not worthy of being chosen (especially as a spouse) undesirable,

inapplicable undesirable

unsuitably

unsuitableness