IPA: /ˈnɪb.lər/
KK: /ˈnɪblər/
A person or animal that takes small bites of food or a tool used for cutting thin materials.
The rabbit is a nibbler, often seen munching on carrots.
Nibbler → It is formed from "nibble" (originating from Middle English *nibblen*, meaning to bite or chew gently) and the suffix "-er" (meaning a person who). A nibbler is a person or creature that bites or chews gently.
Think of someone who 'bites gently' ('nibble') — the '-er' just means a person. A nibbler is someone who nibbles.