means Feeling intense, overwhelming fear, often to the point of paralysis or panic.

from From Latin 'terrere,' meaning to frighten or fill with dread — the same root that gives us 'terror,' 'terrific' (which once meant terrifying, before it softened into praise), and 'deter' (to scare someone off a path). 'Terrified' is the past participle of 'terrify,' built when 'terrere' picked up the '-ify' suffix (from Latin 'facere,' to make), so the word literally means 'made full of terror.'