the world > movement > motion in specific manner > sudden movement > make sudden movement [verb (intransitive)] > make spasmodic movement > twitch (3)
intransitive. To move with a jerk or jerks; to give a jerk.
intransitive. Of a person, animal, part of the body, etc.: to make a short, sudden, convulsive or spasmodic movement; to jerk, to jump, to start…
intransitive. To move about restlessly or uneasily; also, to fidge about, to fidge abroad, to fidge to and fro. Of a limb: To twitch.