Is tense refers to a state of nervousness, anxiety, or stress. In contrast, the antonyms for is tense would be relaxed, calm, easy, and composed. When a person is relaxed, they experience a feeling of tranquility and peacefulness, whereas when someone is calm, they are composed and collected in the face of challenging situations. When a person feels at ease, they are comfortable and untroubled, and life seems to flow effortlessly. Being composed means having control over one's emotions regardless of the circumstances. In conclusion, the opposite of is tense reflects a state of complete calmness, composure, and peace of mind.