Dis-tension refers to the state of being tense or strained. However, there are several antonyms for this word that convey a sense of relaxation and ease. One such antonym is "relaxation," which means the state of being free from tension or stress. Another antonym is "calmness," which refers to a state of tranquility and peacefulness. "Ease" is also an antonym for dis-tension, signifying a lack of difficulty or discomfort. These words describe a state of mind that is calm, peaceful and free from anxiety. Using these antonyms for dis-tension can help alleviate feelings of stress and promote a sense of wellbeing.