Trepidant is used to convey a sense of quivering motion or instability that can be both physical and metaphorical. In some passages, it describes rapid, trembling movement—a gait that becomes awkward or a sudden bout of unsteadiness that leads to a fall ([1], [2]), or even a dizziness affecting one's ability to walk ([3]). In classical compositions, the term is employed with a lyrical quality to depict the delicate flutter of wings or limbs ([4], [5]), as well as to dramatize the responsiveness of monumental objects or frameworks to divine influence, as when gates appear to tremble at a nod from a higher power ([6], [7]). Moreover, the word also encapsulates the vulnerable, excited energy of youth or collective agitation ([8], [9]), further enriched by its use in poetic invocations that link trembling flame or smoke to nature’s restless movement ([10], [11]).