petasus

The story

1. Ancient Greek · derived fromπεταννύναι“to spread out”
2. Koine Greek · derived fromπέτασος
3. Latin · borrowed frompetasus
4. English todaypetasus

Borrowed from Latin petasus, and its source, Koine Greek πέτασος (pétasos), from Ancient Greek πεταννύναι (petannúnai, “to spread out”).

First known use, by meaning

• from 16th c. A broad-brimmed, low-crowned hat worn by the Ancient Greeks and Romans, especially for travelling, and as often pictured to be worn by Hermes (or Mercury); (later also) the brimless winged cap worn by Hermes in later artistic depictions.