| 1 | English | parallel | Equally distant from one another at all points;... |
| 2 | Middle French | parallèle | — |
| 3 | Latin | parallēlus | — |
| 4 | Ancient Greek | παράλληλος | beside one another, side-by-side; parallel to or... |
| 5 | Ancient Greek | ἀλλήλων | referring back to a plural subject, and... |
| 6 | Ancient Greek | ἄλλος | other, another, different, else; in combination... |
| 7 | Ancient Greek | κρίνω | To separate, divide, part, distinguish between... |
| 8 | Proto-Hellenic | kríňňō | — |
| 9 | Proto-Indo-European | krinyéti | — |
| 10 | Proto-Indo-European | krey- | to sift, separate, divide |