| 1 | Middle English | ēther | the "caelum aetherum" of ancient cosmology in... |
| 2 | Middle French | ethere | — |
| 3 | French | éther | ether |
| 4 | Latin | aetherius | Of or pertaining to the ether, the sky, or the... |
| 5 | Ancient Greek | αἰθέριος | of or pertaining to the upper air; ethereal,... |
| 6 | Ancient Greek | Αἰθήρ | Upper Air |
| 7 | Ancient Greek | αἴθω | To ignite, kindle, light; To burn, blaze |
| 8 | Proto-Hellenic | *áitʰō | — |