tremulous
adjective
[ ˈtrɛmjʊləs ]
• shaking or quivering slightly.
• "Barbara's voice was tremulous"
Similar:
shaky,
trembling,
shaking,
unsteady,
quavering,
wavering,
quivering,
quivery,
quaking,
nervous,
weak,
trembly,
all of a tremble,
Origin:
early 17th century: from Latin tremulus (from tremere ‘tremble’) + -ous.