'adrad' originates from Old English, specifically the word 'ādrǣdan,' where 'ā-' meant 'intensely' and 'drǣdan' meant 'to dread.'

'ādrǣdan' transformed into the Middle English word 'adrad,' and eventually became the modern English word 'adrad.'

Initially, it meant 'to intensely dread or fear,' but over time it evolved into its current meaning of 'being afraid or frightened.'