GMAT Vocabulary Flash Cards @ englishpdf.com and englishteststore.com File 495 perpendicular (adj) Straight up and down perpetrator (n) The doer of a wrong or a criminal act perpetual (adj) never ceasing; continuous perpetuate (v) To preserve from extinction or oblivion perquisite (n) Any profit from service beyond the amount fixed as salary or wages persecution (n) Harsh or malignant oppression perseverance (n) A persistence in purpose and effort persevere (v) To continue striving in spite of discouragements