| 1 | English | diët | Rare spelling of diet |
| 2 | Middle English | diet | — |
| 3 | Old French | diete | diet |
| 4 | Medieval Latin | dieta | regimen, regulation; assembly; daily allowance,... |
| 5 | Latin | diaeta | diet, regimen; house, dwelling; diet, assembly |
| 6 | Ancient Greek | δίαιτα | way of living, way of life, mode of life,... |
| 7 | Ancient Greek | -μᾰ | "suffix forming a noun denoting the result of an... |
| 8 | Proto-Indo-European | -mn̥ | Creates action nouns or result nouns from verbs |