segregate: [16] The etymological idea underlying segregate is of ‘removal from a flock’. The word comes from Latin sēgregāre, a compound verb formed from the prefix sē- ‘apart’ and grex ‘flock’ (source also of English aggregate, congregation, egregious [16], and gregarious [17]). => aggregate, congregation, egregious, gregarious[segregate etymology, segregate origin, 英语词源]