akin

The two languages are closely akin.这两种语言非常相似。

The two languages are closely akin to one another.这两种语言非常相似。

a feeling akin to loneliness [=a feeling that resembles loneliness]近乎孤独之感

To break your promise to him would be akin to betraying your friendship.违背对他的承诺几乎就是背叛你们的友谊。