| 1 | French | ennui | Boredom; lassitude; Trouble, issue, annoyance |
| 2 | Old French | enui | pain; suffering; anguish |
| 3 | Old French | enuier | Alternative form of enoiier; to molest, harm,... |
| 4 | Latin | inodiāre | — |
| 5 | Latin | odium | hatred, ill-will, aversion, dislike, disgust,... |
| 6 | Proto-Indo-European | h₃ed- | to smell, stink; to hate; to bite |