Word Origin & History
pendize, early 14c., from Anglo-Fr. pentiz, aphetic of O.Fr. apentis "attached building, appendage," from M.L. appendicium, from L. appendere "to hang." Modern spelling is from c.1530, by folk etymology influence of M.Fr. pente "slope," and English house (the meaning at that time was "attached building
with a sloping roof or awning"). Originally a simple structure (M.E. homilies describe Jesus' birthplace in the manger as a "penthouse"); meaning "apartment or small house built on the roof of a skyscraper" first recorded 1921, from which time dates its association with luxury.