Auto
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late 19th century: abbreviation of automobile.
wiktionary
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
auto (n.)
1899 as shortened form of automobile (q.v.). Similar evolution yielded French, German auto.