⒈ 形容關系很密切。
英all is common; be on very intimate terms; with no distinction between what is one's own and what is another's;
⒈ 比喻感情非常親密。
例如：「他和我情同手足，不分彼此。」
⒉ 同心合力。
引《文明小史·第二二回》：「左右是替皇上家出力，同舟之誼，不分彼此的。」
英語to make no distinction between what's one's own and what's another's (idiom)?, to share everything, to be on very intimate terms