The Spanish word 'salva' (meaning 'salute') traces back to the Latin word 'salvus' meaning 'safe' or 'whole'. From this Latin adjective came the verb 'salvare' meaning 'to save', which evolved into the Spanish verb 'salvar' (to save). The noun 'salva' developed from this verb, taking on the meaning of a salute - a gesture or action meant to show respect or honor, conceptually related to wishing someone's safety or well-being.

Some common related Spanish words include the verb 'salvar' (to save), 'salvador' (savior), and 'salvavidas' (lifeguard, life preserver). These words all share the core concept of safety and preservation from the Latin root.

English speakers might recognize the connection to words like 'salvation', 'salvage', and 'safe', which all trace back to the same Latin root 'salvus'. While 'salvation' refers to being saved (especially in a religious sense), 'salvage' refers to saving or rescuing property, and 'safe' directly preserves the original Latin meaning of being free from harm.