co·a·lesce /ˌkəʊəˈles $ ˌkoʊ-/ verb [intransitiveI] formal UNITEif objects or ideas coalesce, they combine to form one single group 联合,合并 SYN fusecoalesce into/with Gradually the different groups of people coalesced into one dominant racial group. 不同种群的人逐渐融合,成为一个主要的种族群体。
—coalescence noun [uncountableU]