trembling trembling /ˈtrɛmblɪŋ/

adjective

1. () Vibrating slightly and irregularly; as e.g. with fear, cold or like the leaves of an aspen in a breeze  ( shaky , aquiver , atremble , shivering , trembling , quivery )
   vibrating slightly and irregularly; as e.g. with fear, cold or like the leaves of an aspen in a breeze
    A quaking bog
   a quaking bog
    The quaking child asked for more
   the quaking child asked for more
    Quivering leaves of a poplar tree
   quivering leaves of a poplar tree
    With shaking knees
   with shaking knees
    Seemed shaky on her feet
   seemed shaky on her feet
    Sparkling light from the shivering crystals of the chandelier
   sparkling light from the shivering crystals of the chandelier
    Trembling hands
   trembling hands
   

noun

1. () A shaky motion  ( palpitation , quiver , quivering , shakiness , shaking , trembling , vibration )
   a shaky motion
    The shaking of his fingers as he lit his pipe
   the shaking of his fingers as he lit his pipe