In an undesirous manner.

objectionable or not likely to please

An undesirable person.

Not desired; unwanted.

In an undesirable manner.

plural of undesirable

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

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

Not desirous

plural of undesirableness