This is the 1262nd most frequent Korean word.
가면
Mask.
Here, "가면" refers to an actual physical mask used as a prop or costume item.
가면을 쓰고 무대에 섰어요.
I wore a mask and stood on the stage.
Here, "가면" is used as a grammatical construct combining "가다" (to go) and "면" (if clause).
학교에 가면 친구들을 만날 수 있어요.
If I go to school, I can meet friends.
In this sentence, "가면" metaphorically represents a facade or pretense to conceal one's true feelings or intentions.