GMAT Vocabulary Flash Cards @ englishpdf.com and englishteststore.com File 541 prototype (n) A work, original in character, afterward imitated in form or spirit protract (v) To prolong protrude (v) To push out or thrust forth protrusion (n) The act of protruding protuberance (n) Something that swells out from a surrounding surface protuberant (adj) Bulging protuberate (v) To swell or bulge beyond the surrounding surface proverb (n) A brief, pithy saying, condensing in witty or striking form the wisdom of experience