| 1 | Middle English | humour | A "cardinal humour"; A bodily liquid or substance... |
| 2 | Old French | humor | humor |
| 3 | Latin | humor | liquid, fluid, humour; first-person singular... |
| 4 | Latin | umor | liquid, fluid, humour; moisture |
| 5 | Latin | -or | used to form a third-declension masculine... |
| 6 | Proto-Italic | -ōs | Creates masculine action nouns or result nouns... |
| 7 | Proto-Indo-European | -ōs | Creates masculine and feminine action nouns or... |
| 8 | Proto-Indo-European | -oss | — |
| 9 | Proto-Indo-European | -os | Creates action nouns or result nouns from verbs;... |