Breadcrumb Home > Thesaurus > I Synonyms of impair Find synonyms for: Verb 1. impair, damage usage: make worse or less effective; "His vision was impaired" 2. mar, impair, spoil, deflower, vitiate, damage usage: make imperfect; "nothing marred her beauty" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of impair (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: jactation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language