This is the 19584th most frequent Korean word.
어려웠고
"Was difficult."
In this sentence, "어려웠고" is used to describe the difficulty faced with a project, connecting it to the subsequent clause emphasizing the need for effort.
그 프로젝트는 정말 어려웠고 많은 노력이 필요했습니다.
That project was really difficult and required a lot of effort.
Here, "어려웠고" describes challenging life conditions during youth and links this to the actions needed to overcome obstacles.
그는 어렸을 때 삶이 어려웠고 많은 장애물을 극복해야 했습니다.
When he was young, life was difficult and he had to overcome many obstacles.
In this context, "어려웠고" denotes the challenges in acquiring cultural and linguistic knowledge, transitioning into the time-consuming aspect of the task.