IPA: /ˈruːtər/
KK: /ˈruːtər/
A person who supports or cheers for a sports team or player, often showing enthusiasm and encouragement.
The fans were loud and excited, cheering like true rooters for their team during the game.
The word 'rooter' is derived from 'root' (from Old English 'wrot', meaning the part of a plant that grows underground) and the suffix '-er' (meaning a person who). A rooter is a person who supports or cheers for a team, often used in the context of sports.
Think of someone who is a 'supporter' ('-er') of the 'roots' of a team, cheering them on like the roots of a plant that support its growth.