/ Dictionary / Index P participialize: Meaning and Definition of Find definitions for: par•ti•cip•i•al•ize Pronunciation: (pär"tu-sip'ē-u-līz"), [key] — -ized, -iz•ing. to form (a word) into a participle; make participial. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. participial participle Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language