#interpersonal conflict

• Animosity — A feeling of hostility, deep antipathy, hidden hatred, or resentment steadily manifested between two or more persons or social groups. This behavioral phenomenon translates into heightened interpersonal tensions, frequent disputes, and a structural psychological resistance to any attempt at reconciliation or harmonious communication.
• Antagonize — To provoke antagonism, to arouse someone's hostility or opposition through defiant behavior, adverse decisions, or provocative statements. In a medical or biochemical sense, it represents the action of counteracting, neutralizing, or canceling the effect of a substance, hormone, or drug via an opposing agent.