quaking
1. [ adjective ] vibrating slightly and irregularly; as e.g. with fear or cold or like the leaves of an aspen in a breeze
Synonyms: trembling quivering shaking shivering shaky
Examples:

"a quaking bog" "the quaking child" "quivering leaves of a poplar tree" "with shaking knees" "seemed shaky on her feet" "trembling hands"

Related terms: unsteady