coupling

n 1 (a) [U] act of joining 连结. (b) [C, U] (arch or rhet 古或修辞) (act of) sexual intercourse 性交; 云雨. 2 [C] link connecting two parts, esp two railway carriages or other vehicles 连接器; （尤指列车等的）车钩, 挂钩.

countless, countrified, country, country club, country dance, country house, country seat, country-and-western, country-house, countryman, countryside, county, county council, county court, county town, coup, coup de grace, coupe, couple, couplet, coupon, courage, courageous, courageously, courgette, courier, course, coursing, court, court martial, court of law, court order, court-card, court-house, court-martial, courteous, courteously, courtesan, courtesy, courtesy title,