| 1 | Lao | ລົດ | to reduce, lower; vehicle, car, bus; flavour;... |
| 2 | Thai | รถ | chariot, carriage, cart, wagon, or the like;... |
| 3 | Pali | ratha | a chariot, a car; delight, pleasure |
| 4 | Sanskrit | रथ | chariot, car, especially a two-wheeled... |
| 5 | Proto-Indo-Iranian | Hrátʰas | chariot |
| 6 | Proto-Indo-European | Hrót-h₂-os | — |
| 7 | Proto-Indo-European | Hret- | to roll; wheel; to run, roll |