This is the 1632nd most frequent Korean word.
보내고
"보내고" means "sending" or "after sending."
In this sentence, '보내고' is the connective form of the verb '보내다' (to send). It is used to indicate the action of sending a letter followed by waiting for a reply.
친구에게 편지를 보내고 대답을 기다렸다.
I sent a letter to my friend and waited for the reply.
Here, '보내고' is derived from the verb '보내다' (to spend, as in time), and it signifies the act of spending time with family.
그는 가족들과 즐거운 시간을 보내고 있었습니다.
He was spending joyful times with his family.
In this instance, '보내고' refers to the action of experiencing or going through the day, reflecting a use of '보내다' when describing the passage of time or events.