Garret
Middle English (in the sense ‘watchtower’): from Old French garite, from garir (see garrison).
wiktionary
From Middle English garett, garite, from Old French garite, guerite(“watchtower”), from garir, guarir(“to defend, protect”) (compare English garrison), ultimately of Germanic origin (see English garage). Doublet of guerite.
etymonline
garret (n.)
c. 1300, garite, "turret, small tower on the roof of a house or castle," from Old French garite "watchtower, place of refuge, shelter, lookout," from garir "defend, preserve," which is from a Germanic source (compare Old English warian "to hold, defend," Gothic warjan "forbid," Old High German warjan "to defend"), from Proto-Germanic *warjan, from PIE root *wer- (4) "to cover." Meaning "room on uppermost floor of a house," especially a room with a sloping roof, is from early 14c. See attic. As the typical wretched abode of a poor poet, by mid-18c.
