secede

1. V-I If a region or group secedes from the country or larger group to which it belongs, it formally becomes a separate country or stops being a member of the larger group. (從國家或大集團(tuán)中正式)脫離

Singapore seceded from the Federation of Malaysia and became an independent sovereign state. 新加坡脫離馬來西亞聯(lián)邦成為一個(gè)獨(dú)立的主權(quán)國家。

Ukraine decided to secede. 烏克蘭決定獨(dú)立出來。