aghast

the word 'aghast' has its roots in old english, emerging from the verb 'agasten', meaning 'to terrify'. its core component, 'gast', shares an origin with the word 'ghost', both stemming from a common germanic root related to fear and spirit. the intensive prefix 'a-' amplifies this sense of terror. over time, the verb fell into disuse, but its past participle form 'aghast' survived as an adjective, solidifying its meaning as a state of being struck with sudden and profound dread or horror.

this word is a simplex form. it is a past participle of the obsolete middle english verb 'agasten', meaning 'to terrify'. the 'a-' is a prefix from old english 'ā-', an intensifier, and 'gast' is from old english 'gǣstan', meaning 'to terrify' or 'to torment', related to 'ghost'.