The antonyms for the term "most frothing" include calm, composed, peaceful, tranquil, serene, placid, still, collected, and quiet. These words indicate a sense of calmness and tranquility, which stands in stark contrast to the frothing aggression and intensity that most frothing entails. Calm suggests a peaceful and relaxing state of mind while composed means collected and self-assured. On the other hand, placid denotes a tranquil and undisturbed condition. Finally, serene implies a state of peace and tranquility, and there is a sense of stillness that comes with being collected or quiet. As a result, these antonyms provide an excellent way to express the opposite of most frothing.