| 1 | English | hour | A time period of sixty minutes; one twenty-fourth... |
| 2 | Middle English | houre | hour; A time, occasion, or moment; A canonical... |
| 3 | Old French | houre | hour; time; moment to do something |
| 4 | Latin | hōra | — |
| 5 | Ancient Greek | ὥρα | any defined period of time; season; climate |
| 6 | Proto-Hellenic | *worā | — |
| 7 | Proto-Indo-European | wēr- | true |
| 8 | Proto-Indo-European | wer- | to burn; to cover, heed, notice; squirrel |