This is the 1809th most frequent Korean word.
하니
"하니" is an informal or literary way of saying "so" or "because," often used to indicate a reason or cause in a sentence.
In this sentence, '하니' is used to indicate that the statement about the task being not difficult has been heard or claimed by someone else.
이 일이 그렇게 어렵지는 않다 하니 도전해 보겠습니다.
I heard this task is not that difficult, so I will give it a try.
Here, '하니' conveys a statement reported by someone else about the individual's hard work.
그가 그렇게 열심히 노력한다 하니 대단하죠.
I hear he works so hard; isn't that impressive?
In this case, '하니' is used to relay an observation or report about current conditions such as the weather.