情ㄑㄧㄥˊ同ㄊㄨㄥˊ手ㄕㄡˇ足ㄗㄨˊqíngtóngshǒuzú

  1. 彼此情感像親兄弟一樣。也作「情若手足」。例 「他倆合作多年，互相扶持，情同手足」。

英as close as one's hands and feet (idiom)​; loving one another as brothers, deep friendship, closely attached to one another
德einander wie Brüder sein (Adj)​