큰 힘이

great strength

→ 크다
phrase Rare #26,118
great strength 힘 can also mean help or support, especially in phrases like 큰 힘이 되다 (“be a great help”). 이 marks the phrase as the subject.
KO: 네 응원이 나에게 큰 힘이 돼.
EN: Your encouragement is a great help to me.

큰 힘이 있잖아

You have a lot of power, you know.

— 하울의 움직이는 성 (2004)

뭐, 그 돌에는 큰 힘이 없는 것 같네

Well, that stone doesn’t seem to have much power.

— 그대들은 어떻게 살 것인가 (2023)