I don’t see how you have the gall to face me.

gall n.
1. (尤指公牛的)胆汁
2. [古语]胆囊
3. 苦的东西,苦物；苦味
4. (精神上的)痛苦,苦恼；痛苦难忍的事
5. 恶毒；深仇,怨恨
6. [美国口语]厚颜无耻；大胆,莽撞
近义词:
temerity
have the gall to 居然有脸(做某事)；竟然好意思(做某事