Twitch is a one-syllable noun referring to a quick, involuntary spasm or jerk of the body, often resembling a spasm or tremor. It can also denote a rapid, twitch-like motion or gesture. In modern usage, it’s widely recognized as the name of the popular livestream platform, but the core sense remains a sudden movement. The word conveys a momentary, slight, and often uncontrollable action.
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