courteous

a.客气的，谦恭的

coup de grace, coupe, couple, couplet, coupling, coupon, courage, courageous, courageously, courgette, courier, course, coursing, court, court martial, court of law, court order, court-card, court-house, court-martial, courteously, courtesan, courtesy, courtesy title, courtier, courtliness, courtly, courtroom, courtship, courtyard, cousin, cousinly, couture, couturier, cove, coven, covenant, Coventry, cover, cover charge,