Peiriannwr, Peiriannydd, n. organizer, harnesser
Peiriwyddiad, n. a verb
Peiriennyn, n. an instrument
Peisgwyn, n. the mapple tree
Peiswyn, n. chaff
Peithas, n. a scout, a scout boat
Peithiad, n. a making clear; a laying open or waste
Peithiant, n. a laying open; a scouting
Peithin, Peithiw, a. being open or plain
Peithio, v. to lay open; to scout