1. (noun) a shaky motion

• palpitation
• quiver
• quivering
• shaking
• trembling
• vibration

1. (noun) a shaky motion

• motion

2. (noun) the quality of being unstable and insecure

• instability
• unstableness

1. (noun) a shaky motion

• tremolo
• tremor

1. (noun) a shaky motion

• didder
• shake
• palpitate
• palpitate
• palpitate
• quake
• quake
• quake
• quiver
• quiver
• quiver
• rickety
• shaky
• wobbly
• wonky
• shaky
• shivering
• trembling
• tremble
• vibrate
• vibrational

2. (noun) the quality of being unstable and insecure

• precarious
• shaky