/ Thesaurus / I Synonyms of indeterminably Find synonyms for: Adverb1. indeterminablyusage: in an indeterminable manner; "their relationship was of an indeterminably vague nature"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language