Ill-feeling is an emotion that can be expressed in many different ways. BITTERNESS (10 letters) is a strong feeling of resentment or displeasure, often caused by a sense of injustice. ACRIMONY (8 letters) is a feeling of BITTERNESS and ill-will, usually expressed through harsh words or actions. MALAISE (7 letters) is a general feeling of unease or discomfort, often accompanied by physical symptoms. ANIMUS (6 letters) is a feeling of strong dislike or enmity. RANCOUR (7 letters) is a deep-seated feeling of hatred or resentment. All of these terms describe different aspects of ill-feeling, which can range from mild annoyance to intense hatred.