tremble

nouns

a reflex motion caused by cold or fear or excitement
shake, shiver, tremble

verbs

move or jerk quickly and involuntarily up and down or sideways
"His hands were trembling when he signed the document"
tremble
is derived from
trembler
is derived from
trembling
is a type of (narrower)
move or cause to move back and forth
"The chemist shook the flask vigorously"; "My hands were shaking"
agitate, shake