Peripheral:1. : of, relating to, involving, or forming a periphery or surface part. Peri:noun1. : (in Persian mythology) a mythical superhuman being, originally represented as evil but subsequently as a good or graceful genie or fairy. Feral:1. : of, relating to, or suggestive of a wild beast; feral teeth; feral instincts. Imp:noun1. : a small, mischievous devil or sprite.