| 1 | Manx | molteyragh | fallacious, insidious, fraudulent, deceptive;... |
| 2 | Manx | molteyr | deceiver, charlatan, duper, fraud, cheat, con... |
| 3 | Manx | moll | fool, baffle, foil, beguile, cajole, captivate,... |
| 4 | Middle Irish | mellaid | to deceive, beguile, seduce |
| 5 | Middle Irish | mell | — |
| 6 | Old Irish | meld | — |
| 7 | Proto-Celtic | *meldos | — |
| 8 | Proto-Indo-European | meld- | to beat, crush, grind |
| 9 | Proto-Indo-European | mel- | soft; tender; weak; to deceive; to rub |
| 10 | Proto-Indo-European | mey- | to strengthen; to bind; to change, exchange |