Mutually destructive; most often applied to warfare.
Characterized by struggle within a group, usually applied to an ethnic or familial relationship.
Hateful or strongly antipathetic.
Severely negative or harmful.
Having a chemical nature that is harmful to health or lethal if consumed or otherwise entering into the body in sufficient quantities.
Appearing grossly unwell; characterised by serious, potentially life-threatening compromise in the respiratory, circulatory or other body systems.