/ Thesaurus / U Synonyms of unattainably Find synonyms for: Adverb1. unattainably, unachievablyusage: in an unattainable manner or to an unattainable degree; "this house is unattainably expensive"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language