| 1 | English | opera | A theatrical work, combining drama, music, song... |
| 2 | Italian | opera | work; means, help, services; opus |
| 3 | Latin | opera | work, exertion, effort; service; care, attention... |
| 4 | Latin | Opus | — |
| 5 | Ancient Greek | Ὀποῦς | — |
| 6 | Ancient Greek | ὀπός | juice, vegetable/plant juice; fig-juice |
| 7 | Proto-Indo-European | sokʷós | juice of plants |
| 8 | Proto-Indo-European | sekʷ- | to follow; to see; to say |