definition of
trembling

[1] #1 trembling s. [shaky, shivering] vibrating slightly and irregularly; as e.g. with fear or cold or like the leaves of an aspen in a breeze; "a quaking bog"; "the quaking child asked for more"; "quivering leaves of a poplar tree"; "with shaking knees"; "seemed shaky on her feet"; "sparklin. wn

[2] #2 trembling n. [shaking, shakiness, quiver, quivering, vibration, palpitation] a shaky motion; "the shaking of his fingers as he lit his pipe". wn