This is the 13364th most frequent Korean word.
따낸
"따낸" means "achieved" or "obtained by effort."
In this sentence, '따낸' is used to describe the act of winning or achieving a result (here, victory) through effort.
그는 큰 대회에서 우승을 따낸 경험이 있다.
He has the experience of winning a major competition.
Here, '따낸' implies attaining or achieving something (the contract) through negotiation or effort.
그녀는 어려운 협상에서 중요한 계약을 따냈다.
She secured an important contract in difficult negotiations.
In this sentence, '따낸' is used to indicate accomplishment or achievement.