From un- + desirable.

• IPA: /ˌʌndɪˈzaɪɹəbəl/

undesirable

1. Objectionable or not likely to please.
   • 1943 November – 1944 February (date written; published 1945 August 17), George Orwell [pseudonym; Eric Arthur Blair], Animal Farm […], London: Secker & Warburg, published May 1962, →OCLC ↗:

     There would be no need for any of the animals to come in contact with human beings, which would clearly be most undesirable.

   • 2008, Mary E. Klingensmith, The Washington Manual of Surgery, page 327:

     Chronic venous disease includes cosmetically undesirable telangiectasias, varicose veins, venous ulceration, and claudication.

• desirable

• French: indésirable
• German: unerwünscht
• Italian: indesiderabile
• Portuguese: indesejável
• Russian: нежела́тельный
• Spanish: indeseable

undesirable (plural undesirables)

1. (often, plural) An undesirable person.

• mesel (obs.), see also Thesaurus:criminal, jerk, villain, and troublemaker

• Portuguese: indesejável
• Spanish: indeseable