peep-hole

n small opening in a wall, door, curtain, etc through which one may peep at sth 窥孔.

pedestal table, pedestrian, pedestrian crossing, pedestrian precinct, pedi-, pediatrics, pedicel, pedicure, pedigree, pediment, pedlar, pedlar (US peddler), pedometer, pee, peek, peekaboo, peel, peeler, peelings, peep, peep-show, peeper, Peeping Tom, peepul, peer, peer group, peer of the realm, peerage, peeress, peerless, peeve, peeved, peevish, peevishly, peevishness, peewit (also pewit), peg, peg sth down, peg-board, pejorative,