IPA: /ˈbæt.lər/
KK: /ˈbæt̬lər/
A person who fights or struggles, especially against difficulties or challenges.
She is a true battler, never giving up despite the obstacles in her way.
Battler → The word is formed from "battle" (from Old French *bataille*, meaning a fight or conflict) and "-er" (meaning a person who). A battler is a person who engages in battle or conflict.
Think of someone who is involved in a 'fight' ('battle') — the '-er' indicates that this person is actively participating.