1. (noun) a reflex motion caused by cold or fear or excitement

• shake
• shiver

1. (noun) a reflex motion caused by cold or fear or excitement

• inborn reflex
• innate reflex
• instinctive reflex
• physiological reaction
• reflex
• reflex action
• reflex response
• unconditioned reflex

2. (verb) move or jerk quickly and involuntarily up and down or sideways

• agitate
• shake

1. (verb) move or jerk quickly and involuntarily up and down or sideways

• palpitate
• quake
• quiver
• shiver
• shudder
• thrill
• throb

1. (noun) a reflex motion caused by cold or fear or excitement

• didder
• shake
• rickety
• shaky
• wobbly
• wonky
• shiver
• shudder
• shivery

2. (verb) move or jerk quickly and involuntarily up and down or sideways

• palpitation
• quiver
• quivering
• shakiness
• shaking
• trembling
• vibration
• quaker
• trembler
• shake
• shiver