Cellar
Middle English (in the general sense ‘storeroom’): from Old French celier, from late Latin cellarium ‘storehouse’, from Latin cella ‘storeroom or chamber’.
wiktionary
From Middle English celer, seler, from Anglo-Norman celer, Old French celier (modern cellier), from Late Latin cellārium, from Latin cella. Doublet of cellarium.
From 15th Century English saler, from French salière, from Latin salarius(“relating to salt”), from Latin sal(“salt”)
etymonline
cellar (n.)
early 13c., "store room," from Anglo-French celer, Old French celier "cellar, underground passage" (12c., Modern French cellier), from Latin cellarium "pantry, storeroom," literally "group of cells;" which is either directly from cella "small room, store-room" (from PIE 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 Middle and early Modern English. Related: Cellarer. Cellar-door attested by 1640s.
