| 1 | English | oxidant | an oxidizing agent |
| 2 | French | oxydant | present participle of oxyder; oxidant |
| 3 | French | oxyder | to oxidise |
| 4 | French | oxyde | oxide; first-person singular present indicative... |
| 5 | French | acide | acid, acidic, sour, tart; acid, acidic; acid |
| 6 | Latin | acidus | sour, tart, acid, bitter; harsh, grating, rough,... |
| 7 | Latin | aceō | — |
| 8 | Proto-Italic | akēō | be sharp-tasting, be sour |
| 9 | Proto-Indo-European | h₂eḱ-éh₁-ye-ti | — |
| 10 | Proto-Indo-European | h₂eḱ- | sharp |