'angelicality' originates from English, specifically the adjective 'angelical', where the element 'angel-' ultimately comes from Greek 'angelos' meaning 'messenger'.

'angelicality' evolved from the adjective 'angelical' (modern English), which came via Middle English 'angelic'/'angelical' from Old French 'angelique' and Late Latin 'angelicus', themselves based on Latin 'angelus' and Greek 'angelos'. The noun-forming suffix '-ity' (from Latin '-itas') was added in English to form 'angelicality'.

Initially the root 'angelos' referred to a 'messenger', but through Latin and Old French the sense shifted to qualities associated with angels; over time the term developed into 'angelicality', meaning 'the quality of being angelic'.