| 1 | English | fratricide | The killing of one's brother; A person who... |
| 2 | Middle English | fratricide | — |
| 3 | Middle French | fratricide | — |
| 4 | Latin | fratricidium | the murder of a brother, fratricide |
| 5 | Latin | -cīdium | — |
| 6 | Latin | -ium | Suffix used to form abstract nouns, sometimes... |
| 7 | Latin | -ius | forming adjectives from nouns; nominative neuter... |
| 8 | Proto-Italic | -jōs | Forms comparative adjectives |
| 9 | Proto-Indo-European | -yós | Creates adjectives from noun or verb stems |