INCESTUOUS Scrabble 12 Words With Friends 16 Definition adjective resembling incest as by excessive intimacy. adjective relating to or involving incest. Examples “If you engaged in an incestuous relationship with a family member, that would make you an inbreeder.” See all 341 words you can make from INCESTUOUS → 10-letter words Words starting with I Words ending with S ← Unscramble different letters