This is the 7975th most frequent Korean word.
힘들게
"힘들게" means "with difficulty" or "strenuously."
Here, '힘들게' is used to describe the manner in which the action 'climbing the mountain' was performed.
나는 힘들게 산을 올라갔다.
I climbed the mountain with difficulty.
In this sentence, '힘들게' describes how the success was obtained, emphasizing the effort required.
그는 힘들게 얻은 성공을 자랑했다.
He proudly showcased the success he achieved with great effort.
'힘들게' is used here to convey the challenging effort necessary in the collaborative work.