'hostilely' originates from Latin, specifically the word 'hostilis,' where 'hostis' meant 'enemy.'

'hostilis' transformed into the Old French word 'hostile,' and eventually became the modern English word 'hostilely' through Middle English.

Initially, it meant 'in the manner of an enemy,' but over time it evolved into its current meaning of 'in a manner that shows or feels opposition or dislike.'