a person that you have a special friendship with because you understand each other’s feelings and interests 知心朋友；知己 He's not just my friend, he's my soulmate. 他不仅是我的朋友，还是我的灵魂伴侣。 Natalie and I are soulmates. She's the one I want to spend the rest of my life with. 娜塔莉和我是灵魂伴侣。她是我一生都想与之共度的人。