知己
[zhī jǐ]
n.
confidant
misc.? bosom friend
?
例句：
朋友本應是我們的親密知己和支持者，但對於大多數人來說，有壹些朋友比起幫助我們，更多的卻是阻礙。
Our friends are supposed to be our closest confidantes and support network. But for many of us, they can be more hindrance than help.
其實男生和女生之間是可以有純潔的友情的，但如果妳壹開始就用曖昧的方法對待他的話，那妳就沒那個命擁有壹個藍顏知己。
There could be pure friendship between boys and girls. but if you treat it the other way, you’re in deprivation of owning male confidant.
希望能幫助到妳，望采納！！！