Other forms: guerrillas
A guerrilla is a fighter in a small irregular band. Not an army — a few dozen people who know the ground.
The tactics are hit and run, and the whole method depends on avoiding a set-piece battle against a stronger force. The word is Spanish and means little war, and it entered English during the Peninsular War against Napoleon. Note the double r and double l, which almost everybody gets wrong. Marketing borrowed the word for guerrilla advertising, meaning cheap, surprising and unofficial campaigns.
1nounguerrillaA member of a small irregular armed group using hit-and-run tactics.
“The guerrillas controlled the hills for a decade.”
Also accepted in games: guerilla
A guerrilla is a little war. Spanish guerrilla is the diminutive of guerra, war, so the word named the kind of fighting before it ever named the fighter.
Spanish
guerrilla
English, today
guerrilla
Built from
Borrowed from Spanish guerrilla. Spanish guerrilla, diminutive of guerra (“war”), coined during the Peninsular War.
Etymology from Wiktionary, CC BY-SA