angelyoudaoicibaDictYouDict[angel 词源字典]
angel: [12] In a sense, English already had this word in Anglo-Saxon times; texts of around 950 mention englas ‘angels’. But in that form (which had a hard g) it came directly from Latin angelus. The word we use today, with its soft g, came from Old French angele (the ‘hard g’ form survived until the 13th century). The French word was in its turn, of course, acquired from Latin, which adopted it from Greek ángelos or ággelos.

This meant literally ‘messenger’, and its use in religious contexts arises from its being used as a direct translation of Hebrew mal’ākh ‘messenger’, the term used in the scriptures for God’s intermediaries. The Greek word itself may be of Persian origin.
=> evangelist[angel etymology, angel origin, 英语词源]
angel (n.)youdaoicibaDictYouDict
14c. fusion of Old English engel (with hard -g-) and Old French angele, both from Latin angelus, from Greek angelos "messenger, envoy, one that announces," possibly related to angaros "mounted courier," both from an unknown Oriental word (Watkins compares Sanskrit ajira- "swift;" Klein suggests Semitic sources). Used in Scriptural translations for Hebrew mal'akh (yehowah) "messenger (of Jehovah)," from base l-'-k "to send." An Old English word for it was aerendgast, literally "errand-spirit."

Of persons, "loving; lovely," by 1590s. The medieval gold coin (a new issue of the noble, first struck 1465 by Edward VI) was so called for the image of archangel Michael slaying the dragon, which was stamped on it. It was the coin given to patients who had been "touched" for the King's Evil. Angel food cake is from 1881; angel dust "phencyclidine" is from 1968.