'detestable' originates from Latin, specifically the word 'detestabilis,' where 'de-' meant 'down from' and 'testari' meant 'to bear witness.'

'detestabilis' transformed into the Old French word 'detestable,' and eventually became the modern English word 'detestable' through Middle English.

Initially, it meant 'to bear witness against,' but over time it evolved into its current meaning of 'deserving intense dislike or hatred.'