The Spanish verb 'lavar' (to wash) comes directly from the Latin verb 'lavare', which also meant 'to wash'. This is a straightforward inheritance where both the form and meaning have remained remarkably stable over time, with only minor phonological changes as Latin evolved into Spanish.

Several common Spanish words are related to 'lavar', including: 'lavadora' (washing machine), 'lavaplatos' (dishwasher), 'lavandería' (laundromat), and 'lavamanos' (sink). All these words are compounds or derivatives that incorporate the basic concept of washing.

English has several words derived from the same Latin root 'lavare', including 'lavatory' (a room for washing, now meaning bathroom), 'launder' (to wash clothes), and 'lotion' (a washing preparation, now meaning a cosmetic liquid). The word 'lavender' also comes from this root, as this plant was commonly used in washing and bathing.