unsuitable

adj

1.
not meant or adapted for a particular purpose
Derived from:
unsuitability unsuitableness
2.
not capable of being applied
inapplicable
Derived from:
unsuitability
3.
not conducive to good moral development
Derived from:
unsuitableness
4.
not worthy of being chosen (especially as a spouse)
undesirable
Derived from:
unsuitableness