Definitions for "Internecine"
Involving, or accompanied by, mutual slaughter; mutually destructive.
"Mutually destructive". "Characterised by great slaughter". (???????????????????????????)
Of or pertaining to internal conflicts within a group; as, internecine quarrels.
(of conflict) within a group or organization; "an internecine feud among proxy holders"
characterized by bloodshed and carnage for both sides; "internecine war"