Etymology
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scooter (n.)
1825, "one who goes quickly," agent noun from scoot (v.). Also in 19c. a type of plow and a syringe. As a child's toy, from 1919 (but the reference indicates earlier use), as short for motor scooter from 1917.
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Vespa (n.)
1950, proprietary name of an Italian make of motor scooter, first produced 1946, from Italian, literally "wasp," from Latin vespa (see wasp). Rival brand was Lambretta.
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motor (n.)

"one who or that which imparts motion," mid-15c., "controller, prime mover (in reference to God);" from Late Latin motor, literally "mover," agent noun from past-participle stem of Latin movere "to move" (from PIE root *meue- "to push away"). Sense of "agent or force that produces mechanical motion" is first recorded 1660s; that of "machine that supplies motive power" is from 1856. Motor-home is by 1966. Motor-scooter is from 1919. First record of slang motor-mouth "fast-talking person" is from 1970.

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