1. tremble - noun
· a reflex motion caused by cold or fear or excitement
Hypernym(s): reflex, reflex_response, reflex_action, instinctive_reflex, innate_reflex, inborn_reflex, unconditioned_reflex, physiological_reaction
2. tremble - verb
· move or jerk quickly and involuntarily up and down or sideways; "His hands were trembling when he signed the document"
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