This is the 6790th most frequent Korean word.
이익에
"이익에" means "to the profit" or "to the benefit."
In this sentence, '이익에' indicates a frame of adherence or compliance to benefits or profits.
이익에 반하는 행동은 안 됩니다.
Actions against the benefit are not acceptable.
Here, '이익에' signifies the association with the profits of a specific entity, contributing positively.
그 결정은 회사의 이익에 기여할 것입니다.
That decision will contribute to the company's profits.
The word '이익에' here refers to the concept of profits or benefits, which someone is showing interest in.