| 1 | English | tour | A journey through a particular building, estate,... |
| 2 | Old French | tour | tower |
| 3 | Old French | torner | to turn; to return; to go back |
| 4 | Latin | tornō | — |
| 5 | Latin | tornus | A turner's wheel, lathe; A potter's wheel |
| 6 | Ancient Greek | τόρνος | A tool similar to a pair of compasses used to... |
| 7 | Proto-Indo-European | torh₂no- | — |
| 8 | Proto-Indo-European | terh₁- | to rub, turn; to drill, pierce |