internecine

adjectives

(of conflict) within a group or organization
"an internecine feud among proxy holders"
is similar to
happening or arising or located within some limits or especially surface
"internal organs"; "internal mechanism of a toy"; "internal party maneuvering"
characterized by bloodshed and carnage for both sides
"internecine war"
is similar to
having or covered with or accompanied by blood
"a bloody nose"; "your scarf is all bloody"; "the effects will be violent and probably bloody"; "a bloody fight"