| 1 | English | untruthful | Not giving the truth; providing untrue facts;... |
| 2 | English | truthful | Honest, and always telling the truth; Accurately... |
| 3 | English | truth | True facts, genuine depiction or statements of... |
| 4 | Middle English | troute | — |
| 5 | Old English | truht | trout |
| 6 | Old French | truite | — |
| 7 | Latin | tructa | a kind of trout |
| 8 | Ancient Greek | τρώκτης | gnawer, nibbler; greedy knave; kind of fish with... |
| 9 | Ancient Greek | -τής | Appended to verbs to form agent nouns |
| 10 | Ancient Greek | πεῖρα | trial, experiment, attempt |
| 11 | Proto-Indo-European | per- | before, in front; first; to go through |
| 12 | Proto-Indo-European | pr̥tós | passed , crossed |