objectionable or not likely to please

An undesirable person.

plural of undesirable

(uncountable) The condition or quality of being undesirable. / (countable, rare) An undesirable quality or thing.

plural of undesirableness

Not desired; unwanted.

In an undesirable manner.

(uncountable) The property of being undesirable. / (countable) Something undesirable.

Not desirous

Lack or absence of desire; desirelessness.