The phrase "am on edge" can be defined as a feeling of unease or nervousness. The antonyms for this phrase include calm, relaxed, composed, tranquil, serene, and peaceful. When we are calm, we feel free from agitation, nervousness, or emotional disturbance. Being relaxed means being at ease, and not tense or anxious. Being composed refers to being cool, collected, and self-controlled. Tranquil suggests a sense of quietness, serenity, and inner peace. Serene means being peaceful, untroubled, and without disturbance. When we feel peaceful, we are free from worry and strife. All of these antonyms signify a state of emotional stability that is opposite of being on edge.