This is the 7876th most frequent Korean word.
협약에
"협약에" means "in the agreement" or "to the agreement" in English.
In this sentence, '협약에' is used to indicate the agreement (협약) they signed or entered into.
그들은 새로운 환경 협약에 서명했습니다.
They signed a new environmental agreement.
Here, '협약에' refers to the topic of the agreement, implying the subject of discussion.
전문가들은 협약에 대해 논의를 시작했습니다.
The experts began discussions about the agreement.
In this sentence, '협약에' denotes the basis or condition of actions that were performed as per the agreement.