| 1 | Latin | iris | rainbow; Third-declension noun; dative/ablative... |
| 2 | Ancient Greek | ἶρις | rainbow; halo; various species of the genus... |
| 3 | Proto-Indo-European | wey-ro- | a twist, thread, cord, wire |
| 4 | Proto-Indo-European | weh₁y- | to twist, wind, weave, plait; to wrap, enclose,... |