tremble
v.v. to shake slightly because you are cold, afraid, or very excited. It is a small movement that you cannot control.
v. to shake involuntarily with short, quick movements, typically as a result of anxiety, cold, or physical weakness. Often describes a physical reaction to intense emotion or environmental conditions.
Her hands began to tremble as she opened the letter.
The small dog started to tremble when it heard the loud thunder during the storm.
Even the most experienced public speakers may find their voices begin to tremble slightly when addressing an audience of thousands for the first time.
From Middle English tremblen, from Old French trembler, from Late Latin tremulāre, ultimately from Latin tremere (“quiver, shake”). Cognate with Ancient Greek τρέμω (trémō).
The verb is intransitive and does not take a direct object.
He was trembling his handsHis hands were tremblingTremble is an intransitive verb; you cannot 'tremble' an object like your hands.