Unsuitable
Part of speech: adjective
Definition: Not suitable; unfit; inappropriate.
Undesirable
Part of speech: adjective
Definition: objectionable or not likely to please
Part of speech: noun
Definition: an undesirable person
Unsuitable as an adjective is not suitable; unfit; inappropriate. while Undesirable as an adjective is objectionable or not likely to please
Part of speech: adjective
Definition: Not suitable; unfit; inappropriate.
Part of speech: adjective
Definition: objectionable or not likely to please
Part of speech: noun
Definition: an undesirable person
We hope you now know whether to use Unsuitable or Undesirable in your sentence.