Salvo derives via Italian and French from the Latin adjective salvus, meaning "healthy." Salve, another form of the word, means "hail!" in Latin and was used as a greeting by ancient Romans. (Incidentally, the English salve, referring to a medicinal substance, is no relation.) In English, salvo originally referred to a simultaneous discharge of two or more firearms performed as a salute—which is appropriate, since salute is another descendant of salvus. With time salvo came to refer to such a discharge performed as an act of war. Nowadays a salvo is most often an act of figurative war—such as a critical remark aimed at a debate opponent, or a business decision in a highly competitive industry.