Salud / Salut
This is a Latin word that variously means “to your health” (in Spanish), or “salutations; I salute you” in Italian.
It’s used as a toast when drinking, and occasionally as an alternative to “bless you” when someone sneezes.
Why I Looked It Up
A character in a novel said it as a toast. I had heard it for years, but had little idea of what it actually meant.