Meaning of “shaky” - Learner’s Dictionary

shaky

adjective uk us /ˈʃeɪki/
MOVING

making quick, short movements from side to side or up and down:

shaky hands
NOT STRONG

not physically strong because you are nervous, old, or sick:

I felt a bit shaky when I stood up.
LIKELY TO FAIL

not working well and likely to fail:

They managed to win the game, despite a very shaky start.

(Definition of “shaky” from the Cambridge Learner’s Dictionary © Cambridge University Press)