'angelically' originates from Medieval Latin, specifically the word 'angelicus,' where 'angelus' meant 'angel' and the suffix '-icus' formed adjectives meaning 'pertaining to.' The adverbial suffix '-ly' was added in English.

'angelicus' transformed into the Old French word 'angelique,' which entered Middle English as 'angelic.' The adverbial form 'angelically' was created in English by adding '-ly.'

Initially, it meant 'in the manner of an angel,' and this meaning has remained consistent in modern usage.