/ Thesaurus / U Synonyms of undrained Find synonyms for: Adjective1. undrained (vs. drained)usage: not drained; "preserve wetlands; keep them undrained"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language