IPA: /ˈfɪd.lər/
KK: /ˈfɪd.lɚ/
A person who plays the fiddle, which is a type of violin, often in a lively or informal style.
The fiddler played a joyful tune at the festival.
Fiddler → The word 'fiddler' is formed from 'fiddle' (from Middle English *fidel*, meaning a stringed instrument) and '-er' (meaning a person who). A fiddler is a person who plays the fiddle, which is a type of violin.
Think of someone who plays a 'fiddle' — that's what a fiddler does, and the '-er' just means a person.