'angels' is the plural of 'angel', which originates from Old English, specifically the word 'engel', from Latin 'angelus', from Greek 'angelos', where 'angelos' meant 'messenger'.

'angelos' in Greek became 'angelus' in Latin, then 'engel' in Old English, and eventually 'angel' in modern English. The plural 'angels' follows the regular English pluralization.

Initially, it meant 'messenger', but over time it evolved to mean 'a spiritual being acting as a messenger of God'.