/ Dictionary / Index D dys-: Meaning and Definition of Find definitions for: dys- Pronunciation: [key] a combining form meaning “ill,” “bad,” used in the formation of compound words: dysfunction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dys- (Thesaurus) Dyothelite dysacousia Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language