IPA: /ˈbɒksə/
KK: /ˈbɑksər/
A person who fights with their fists, especially in a sport or competition.
The boxer trained hard every day to prepare for the championship match.
Boxer → The word 'boxer' is formed from 'box' (from Old English 'box', meaning a container or a case) and '-er' (meaning a person who). A boxer is a person who engages in the sport of boxing, which involves fighting with gloves in a ring.
Think of a 'box' as a container, and remember that a 'boxer' is a person who fights in a ring, much like how a box contains something.