/ Thesaurus / U Synonyms of undiplomatically Find synonyms for: Adverb1. undiplomaticallyusage: without diplomacy; in an undiplomatic manner; "she declined the invitation undiplomatically"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language