The only free and comprehensive online etymological dictionary of the Spanish language
curar (Verb) "to cure," "to treat," "to care for"
12th cent. Old Spanish curiar. From Latin curare 'id.' (Old Latin courare; Archaic Latin coira-). From the noun cura "care" (see cura (2)).
Portuguese curar, Galician curar, Catalan curar, French curer, Italian curare, Aromanian cur, Romanian cura, Sardinian curài, curare