tremulous

Something tremulous is shaky and quivering, usually from fear or lack of strength. If you're nervous at your first big job interview, your hands might be a little tremulous.

You’ve likely heard the unsteady voice of a person close to tears, or seen the trembling legs of a frightened child — both could certainly be described as tremulous. But you can also use this adjective to describe a statement or action that lacks resolution and courage, or even simply something that's shivering from the cold.

Definitions of tremulous
1

adj (of the voice) quivering as from weakness or fear

“spoke timidly in a tremulous voice”
Synonyms:
quavering
unsteady
subject to change or variation

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