Plural of caddy; people who carry golf clubs for players, or small containers for storing tea or other items.
From Scottish Lowland 'cadie', meaning a young man or porter, which derives from French 'cadet' (younger son). The word's journey shows how colonial trade and golf culture spread Scottish terms: 'cadet' became 'cadie' became 'caddy', eventually applying to both golf helpers and small containers (perhaps because caddies originally carried items in small boxes).
Try Another Word