之间,相互
Inter- \In"ter-\ [L. inter, prep., among, between, a compar. form of in in; akin to intra, intro, within, Skr. antar between, in, and E. in. See {In}, and cf. {Entrails}, {Interior}, {Enter-}, {Exterior}.] A prefix signifying among, between, amid; as, interact, interarticular, intermit.