IPA: /ˈrɛs.lər/
KK: /ˈrɛs.lɚ/
A person who competes in wrestling, a sport where two individuals try to gain control over each other using various techniques.
The wrestler trained hard every day to prepare for the championship match.
Wrestler → The word is derived from the Old English 'wræstlian' (meaning to wrestle) and the suffix '-er' (meaning a person who). A wrestler is therefore a person who wrestles.
Think of someone who 'wrestles' ('wræstlian') — the '-er' just means a person. A wrestler is someone who engages in wrestling.