| 1 | Middle French | mutuel | mutual |
| 2 | Latin | mūtuus | — |
| 3 | Latin | muto | I move, remove; I alter, change, modify,... |
| 4 | Latin | -ium | Suffix used to form abstract nouns, sometimes... |
| 5 | Latin | -ius | forming adjectives from nouns; nominative neuter... |
| 6 | Proto-Italic | -jōs | Forms comparative adjectives |
| 7 | Proto-Indo-European | -yós | Creates adjectives from noun or verb stems |