This is the 5260th most frequent Korean word.
대납
"대납" means "payment made on behalf of another."
대납 refers to paying on behalf of someone else, in this case, the company paying a portion of the speaker's salary.
회사에서 내 월급의 일부를 대납해 줬어요.
The company covered part of my salary.
Here, 대납 indicates the act of committing to paying for another person's expenses.
그는 교통비를 대납하기로 약속했어요.
He promised to cover the transportation costs.
In this context, 대납 signifies an automated process where the service assumes the payment responsibility for users.