'heaven' originates from Old English, specifically the word 'heofon,' where 'heofon' meant 'sky' or 'abode of God.'

'heofon' transformed into the Middle English word 'heven,' and eventually became the modern English word 'heaven.'

Initially, it meant 'sky' or 'abode of God,' but over time it evolved into its current meanings of 'the sky' and 'a place of eternal happiness.'