*cumplir* fulfill; keep a promise
*cura* m. priest
*curiosear* watch, pry into others' affairs
*curiosidad* f. curiosity
*cuyo* whose
*charlar* chatter
*chasco* m. disappointment; trick
*chaveta* f. (sometimes written *chabeta*) linchpin, key; *perder la ——* fam. expression go crazy (cf. English go to pieces)
*chico* little; m. boy; f. girl
*chichón* m. bump