The Spanish word 'espanto' (meaning 'fright' or 'terror') traces back to Latin roots. It began with the Latin verb 'pavere' meaning 'to be frightened'. This was combined with the Latin prefix 'ex-' (meaning 'out') to form 'expavere', which meant 'to fear' or 'be frightened'. The word then evolved into the Vulgar Latin 'expaventare' meaning 'to frighten', which developed into the Spanish verb 'espantar' (to frighten). Finally, 'espanto' emerged as the noun form meaning 'fright' or 'terror'.

You can see how the word transformed over time: the Latin prefix 'ex-' became 'es-' in Spanish (a common pattern), and 'pavere' underwent changes until it became '-panto'. The meaning stayed closely related to fear and fright throughout its evolution.

A common related Spanish word is the verb 'espantar', which means 'to frighten' or 'to scare away'. You might hear this in everyday phrases like 'espantar las moscas' (to shoo away flies) or 'espantapájaros' (scarecrow, literally 'bird frightener'). While 'espanto' is the noun for the feeling of fright itself, 'espantar' is the action of causing that fright.

While there aren't any common English words that come directly from the same Latin root 'pavere', we do have some related words that express similar concepts of fear, like 'panic' and 'panic-stricken'. These come from a different but related path through Greek 'panikos', relating to the god Pan who was said to cause sudden fear. The English prefix 'ex-' meaning 'out' or 'from' is the same Latin prefix that appears in 'espanto', though it kept its original form in English.