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diminutive
■ A version of a noun that refers to a small version of something. Such diminutives are formed by adding a prefix:
minibus  microskirt
or a suffix:
notelet  kitchenette  duckling
■ A version of a noun that indicates familiarity or fondness, formed by adding a suffix:
Aussie  sweetie  footer  champers
■ A short form of a personal name:
Timothy → Tim  Katherine → Kath/Kate/Katy