penitentiary

adj (a) of or relating to penance 自我惩罚的; 赎罪的. (b) of or relating to treatment intendedto reform offenders 感化的.

pending, pendulous, pendulum, penetrability, penetrable, penetrate, penetrating, penetratingly, penetration, penetrative, penguin, penholder, penicillin, peninsula, peninsular, penis, penitence, penitent, penitential, penitentially, penitently, penknife (also `pocket-knife), penmanship, pennant, penniless, pennon, pennorth, Pennsylvania, penny, penny farthing, penny whistle, penny-pincher, pennyweight, pennyworth, penology, pension, pensionable, pensioner, pensive, pensively,