The Spanish word 'saludable' (meaning 'healthy') comes from combining two elements: the noun 'salud' ('health') and the suffix '-able' (meaning 'capable of'). The word 'salud' itself comes from Latin 'salus' meaning 'health, well-being', which in turn derived from Latin 'salvus' meaning 'safe, whole'. So 'saludable' literally means 'capable of (having) health' or 'health-giving'.

This etymology shows how the concept of being 'safe' or 'whole' (salvus) evolved into the notion of 'health' (salus), which then carried over into Spanish, where adding the '-able' suffix created a word for describing things that promote or maintain health.

The most common related Spanish word is 'salud', which simply means 'health' and is frequently used in greetings and toasts (¡Salud! - literally wishing good health). Another common related word is 'saludar' which means 'to greet' - this connection makes sense when you consider that greetings traditionally involved wishing someone good health.

English speakers might recognize the connection to words like 'salutary' (beneficial to health), 'salute' (originally a greeting wishing health), and 'safe' (which comes from the same Latin root 'salvus'). The word 'salvation' also shares this root, originally referring to being kept safe or whole before taking on its religious meaning.