Why salary comes from salt

Your salary is named after a Roman salt allowance. So is being “worth your salt”, and so, by a longer road, is the word soldier’s pay.

What everyone sees

A word for regular payment with no obvious relatives.

What is actually happening

Latin salarium derives from sal, salt — an allowance connected to the salt ration or salt-purchase money of Roman soldiers and officials. Salt was the only reliable food preservative in the ancient world, which made it strategically valuable enough to build roads for: the Via Salaria was literally the salt road. The idiom “worth his salt” is the same fossil, still in circulation.

Why it stays hidden

Because etymology decays quietly. Words keep working perfectly while the object they were named after becomes worthless, and nobody has any reason to look inside a word that already does its job.