garishEnglishOxford American Thesaurusgarish adjective they wore silly hats in garish colors: gaudy, lurid, loud, overbright, harsh, glaring, violent, flashy, showy, glittering, brassy, brash; tasteless, in bad taste, vulgar, distasteful, unattractive, nauseating, bilious, sickly; informal flash, tacky. ▷antonyms drab; tasteful.