Auto

google

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late 19th century: abbreviation of automobile.

wiktionary

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From Ancient Greek αὐτός(autós, “self”), metanalyzed from auto- in words such as automatic, autopilot, and automobile.

Clipping of  autorickshaw, from Hindi ऑटो रिक्शा(ŏṭo rikśā). 

etymonline

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auto (n.)

1899 as shortened form of automobile (q.v.). Similar evolution yielded French, German auto.