What does fratricidal mean?
Fratricidal is an adjective describing violence or conflict directed at one's own kin or, by extension, at fellow members of a shared group. Its literal origin lies in fratricide — the killing of a brother — but in contemporary usage it almost always appears in a figurative sense, characterizing civil wars, political feuds, and organizational power struggles as forms of collective self-destruction. A fratricidal war is one in which citizens of the same nation slaughter one another; a fratricidal dispute splits a party or family from within. The word carries an unmistakably negative connotation, suggesting not merely conflict but a tragic, wasteful tearing apart of what should be united. It belongs to formal registers — historical writing, serious journalism, and political analysis — where it often serves as a pointed alternative to milder terms such as 'internal' or 'factional'. Its enduring power comes from that original image: the brother turned against his own brother.
adjectiveRelating to or involving the killing of one's brother, or — in broader modern usage — destructive conflict between members of the same group, nation, or family.
- Of or relating to the act of killing one's own brother.
- Involving destructive conflict among members of the same family, group, organization, or nation — by far the dominant sense in modern usage, especially in political and historical writing about civil wars and factional strife.
"The civil war proved fratricidal, pitting brothers and former neighbours against one another."
"Historians describe the Spanish Civil War as a fratricidal struggle that tore families and villages apart."
"The party's fratricidal leadership battle left it too divided to fight the general election effectively."
It comes straight from Latin 'brother-killer' — a word so grim that its own root, frater, means the person you're supposed to love most.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fratricidal
Fratricidal derives from Latin: frater ('brother') combined with the suffix -cida ('killer'), as in the noun fratricide. The Latin pattern of pairing a victim with -cides produced parallel formations such as homicida and suicide. The English adjective emerged in the early modern period alongside the noun fratricide, which entered English in the 15th–16th centuries via ecclesiastical Latin. Related words sharing the same root frater include fraternal, fraternity, fraternize, and confrère.
Related word forms
How fratricidal is actually used
Formal to semi-formal register, appearing chiefly in history, political journalism, and commentary rather than everyday conversation. While literally denoting the killing of a brother, the word is overwhelmingly used figuratively today for internecine conflict within a single nation, party, company, or movement. The connotation is strongly negative, implying needless self-destruction.
Easily confused with fratricidal
Homicidal refers to the killing of any person generally, whereas fratricidal specifically denotes killing within a family or, more broadly, self-destructive internal conflict within a single group.
Fraternal means brotherly or friendly in manner, while fratricidal describes brother-killing or destructive internal strife — nearly opposite meanings despite both deriving from the Latin frater.