The term "dis-tempered" generally implies a state of being perturbed, agitated or disturbed. It can pertain to psychological or physical dysfunctionality. However, its antonyms relate to the state of calmness, composure, and tranquility. Some words that can be used to describe the opposite of "dis-tempered" are calm, serene, collected, composed and placid. These antonyms signify a harmonious and peaceful condition free from mental or physical agitation. When one is not "dis-tempered," they are more likely to handle difficult situations with ease, make clear decisions, and maintain a positive mindset. Being in a state of tranquility definitely brings a sense of inner satisfaction and helps to maintain sound mental health.