Where does “fratricide” come from?

fratricide (Old French) comes from Latin fratricida, from Latin -cida, from Latin -a, from Proto-Italic -ā, from Proto-Indo-European -éh₂.

Ancestry of “fratricide”, step by step

StepLanguageWordMeaning
1Latinfratricidaa brother's murderer, fratricide
2Latin-cidaNoun-forming suffix denoting “one who kills” or...
3Latin-asuffixed to the roots of verbs, forms agent...
4Proto-ItalicForms masculine agent nouns from prefixed or compounded bases
5Proto-Indo-European-éh₂
Every word from Proto-Indo-European -éh₂Every word from Latin -aEvery word from Latin -cida