tic
UK: tɪk | US: tɪk
n. 1. A sudden, repetitive, nonrhythmic movement or sound, often involuntary (e.g., facial twitch).
n. 2. (Informal) A peculiar or habitual behavior or quirk.
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The word "tic" originates from French (early 19th century), where it referred to a twitching movement or nervous spasm. It may derive from older Italian "ticchio" (whim, caprice) or Lombardic "zicken" (to jerk). The term retains its core meaning of involuntary movement across languages, reflecting its onomatopoeic or imitative roots—evoking the abruptness of the action. As a compact, non-compound word, it resists further morpheme division.
His eye tic became noticeable during stressful meetings.
She developed a verbal tic, frequently clearing her throat.
The comedian mocked his own nervous tics on stage.
In medicine, Tourette syndrome is associated with chronic tics.
Everyone has minor tics, like tapping a pen or biting nails.