copula

n (grammar) type of verb that connects a subject with its complement 系词（即连系动词, 用以连结主语及其补语）: In `George became ill', the verb `became' is a copula. 在Georgebecameill一句中, became是系词.

copartnership, cope, cope with, copeck (also kopeck), Copernican, copier, coping, coping-stone, copious, copiously, copper, copper beech, copper-bottomed, copperhead, copperplate, coppice, copra, copse, Copt, Coptic, copulate, copulation, copulative, copy, copy desk, copy-book, copy-cat, copy-typist, copy-writer, copyist, copyright, coquetry, coquette, coquettish, coquettishly, cor anglais, coracle, coral, coral island, coral reef,