to shake slightly, usually from cold, fear, or emotion
From Old French 'trembler,' derived from Latin 'tremulare' meaning to shake. The root relates to 'tremor' and originally described the involuntary shaking of the body or limbs.
Animals tremble before earthquakes because they sense vibrations humans can't feel—it's their early warning system! This is why 'trembles' also became slang for a nervous, jittery feeling that makes you physically shake.
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