/ Thesaurus / I Synonyms of inefficiently Find synonyms for: Adverb1. inefficientlyusage: in an inefficient manner; "he dealt inefficiently with the crisis"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language