chingar - to bugger, to fuck, to screw

cicatrizar - to heal, to cicatrize

cimentar - to found

clonar - to clone

coadyuvar - to help, to assist, to contribute

coexistir - to coexist

cohibir - to feel embarrassed, to inhibit

coincidir - to coincide

cojear - to lame, to limp

colaborar - to collaborate