unsuitable
adjective
1. not meant or adapted for a particular purpose
- a solvent unsuitable for use on wood surfaces
Similar word(s): unfit
2. not capable of being applied
Similar word(s): irrelevant, inapplicable
3. not conducive to good moral development
- the movie is unsuitable for children
Similar word(s): bad
4. not worthy of being chosen (especially as a spouse)
Similar word(s): ineligible, undesirable