Salad derives from Vulgar Latin '*salata' (salted things), from Latin 'sal' (salt), because early salads were simply salt-dressed vegetables.
A cold dish of various mixtures of raw or cooked vegetables, usually seasoned with oil, vinegar, or other dressing.
From Old French 'salade' (salted vegetables, dressed salad), from Old Provençal 'salada,' from Vulgar Latin *salāta (salted), from Latin 'sal' (salt). The PIE root is *séh₂ls (salt), which gives Latin 'sal,' Greek 'háls,' Old English 'sealt,' and modern English 'salt.' The word derives directly from the ancient practice of salting