It's hard/difficult/easy/convenient/comfortable
1. 잊어버리기(까먹기) 쉬워요.
It's really easy to forget
2. 잃어버리기 쉬워요.
It's really easy to lose.
3. 시끄러워서 집중하기가 어려워요
It's hard/difficult to concentrate.
because it's so noisy.
4. 일주일에 적어도 한 두번은 운동을 하는 것이 중요하다. 그치만 물론 쉬운 일은 아니야.
It's important to exercise at least once or twice a week. but of course It's not easy to do that
https://www.youtube.com/watch?v=Xg1fjoe0cXo&t=41s