There are several synonyms for the word "most trembling". Some of these include "shaking", "quivering", "tremulous", and "shuddering". These words all describe a state of extreme nervousness or fear, where the body experiences involuntary movements or vibrations. Other less common synonyms for "most trembling" may include "trepidation", "palpitation", and "fluttering". When looking for the right synonym to describe a particular situation or emotion, it's important to consider the context and the nuances of each word. By carefully selecting the right synonym, you can give your writing more depth and resonance, and help your audience to better understand your message.