'skulk' originates from Old Norse, specifically the word 'skulka,' where 'skulk-' meant 'to shrink or lurk.'

'skulka' transformed into the Middle English word 'sculken,' and eventually became the modern English word 'skulk.'

Initially, it meant 'to shrink or lurk,' but over time it evolved into its current meaning of 'to move stealthily or furtively.'