| 1 | Middle English | travelen | to make a laborious journey, travel |
| 2 | Middle Scots | travailen | to toil, work, travel |
| 3 | Old French | travailler | Alternative form of traveillier; to suffer; to... |
| 4 | Vulgar Latin | tripaliare | to work; present active infinitive of *tripaliō |
| 5 | Latin | tripalium | torture instrument; a torture instrument |
| 6 | Latin | tripālis | — |
| 7 | Latin | -ium | Suffix used to form abstract nouns, sometimes... |
| 8 | Latin | -ius | forming adjectives from nouns; nominative neuter... |
| 9 | Proto-Italic | -jōs | Forms comparative adjectives |
| 10 | Proto-Indo-European | -yós | Creates adjectives from noun or verb stems |