IPA: /ˈɡeɪmstə/
KK: /ˈɡeɪmstə/
A person who plays games, particularly in a competitive manner or for money.
The gamester placed a large bet on the poker table, hoping to win big.
Gamester → It is formed from "game" (from Old English *gamen*, meaning joy or fun) and "-ster" (a suffix used to denote a person associated with a particular activity). A gamester is a person who engages in games, particularly for enjoyment or competition.
Think of someone who participates in 'games' ('game') — the '-ster' indicates that this person is associated with that activity. A gamester is someone who enjoys playing games.