Origin: 1250–1300; (v.) Middle Englishan(n)oien, enoien < Anglo-French,Old Frenchanoier, anuier to molest, harm, tire < Late Latininodiāre to cause aversion, from Latin phrase mihi in odiō est … I dislike …; cf. in-2, odium, ennui, noisome; (noun) Middle Englisha(n)noi, ennoi < Anglo-French,Old Frencha(n)nui, etc., derivative of the v.
mid-13c., from Anglo-Fr. anuier, from O.Fr. enoiier, anuier "to weary, vex," from L.L. inodiare "make loathsome," from L. (esse) in odio "(it is to me) hateful," abl. of odium "hatred."