English Translation
They dropped out of school.
“put a stop to school.”
그만 (geuman) - “그만” means “stop” or “quit” and indicates the intention to cease or discontinue an action.
두었다 (duyeotda) - “두다” is the verb stem meaning “to put” or “to place.” When combined with the past tense auxiliary verb “-었다,” it forms the past tense form “두었다,” which means “put” or “placed” in this context.