west▪ Cf. Engl cellar, eC13, "store room", from Anglo-Fr celer, oFr celier "cellar, underground passage" (C12, modFr cellier), from Lat cellarium "pantry, storeroom", lit. "group of cells", which is either directly from cella "small room, store-room" (from protIE root *kel- (1) "to cover, conceal, save"), or from noun use of neuter of adjective cellarius "pertaining to a storeroom", from cella. The sense "room under a house or other building, mostly underground and used for storage" gradually emerged in late mEngl and early modEngl -- EtymOnline.