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Autopilot

/ˈɔːtoʊˌpaɪlət/noun

A system that holds an aircraft, ship or car on course without a human at the controls.

The Greek roots

αὐτός
autós
self
+
πηδόν
pēdón
blade of a steering oar

Literally: self steersman

The story of the word

Both halves are Greek, though the second travelled in disguise: pilot runs back through Old French and Medieval Latin to πηδόν, the blade of a steering oar. Lawrence Sperry sold the idea in June 1914 at a Paris safety competition, flying past the judges with both hands in the air while his mechanic walked out along the wing. The shortened autopilot settled in during the 1930s, and the sense of going through the motions without attention is younger still.

How it travelled
Ancient Greek → Latin → Old French → English
First recorded
1930s

Same family

pilotautomaticautonomyautograph

In a sentence

He engaged the autopilot somewhere over Crete and finally ate something.

She answered on autopilot and only registered the question afterwards.

Built on the same root

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