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Semaphore

/ˈsɛməfɔːr/noun

A signalling system that spells out letters with flags or movable arms held in fixed positions.

The Greek roots

σῆμα
sêma
sign, signal
+
φορός
phorós
bearing, carrying

Literally: sign bearer

The story of the word

The word is French, built around 1812 for the chain of shutter towers that carried dispatches across Napoleonic France faster than any horse. Claude Chappe called his own system a télégraphe, so sémaphore attached itself to the arm signals used on coasts and later on railways. σῆμα also meant a grave marker, the sign set over a body, and it gives semantics and semiotics.

How it travelled
Ancient Greek → French → English
First recorded
1816

Same family

semanticssemioticsmetaphorphosphorus

In a sentence

Two cadets stood on the pier working semaphore while the radio was down.

Built on the same root

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