Greek Mythology Notes
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Styx (River)

place
Στύξ
River of unbreakable oaths

The Styx was the most sacred river of the underworld — the river by which the gods swore their most binding oaths, from which no vow could be broken.

The Myth

Styx was both a river and a goddess — an Oceanid who sided with Zeus in the Titanomachy. Zeus honoured her by making her river the binding medium of divine oaths. Any god who swore by the Styx and broke the oath was stripped of speech and breath for nine years. Thetis dipped Achilles in the Styx to make him invulnerable — his heel, where she held him, remained mortal. The river formed the boundary between the world of the living and the dead. Charon's ferry crossed its waters.

Parents

Oceanus and Tethys

Children

Nike, Zelus, Kratos, Bia

Symbols

dark wateroathboundaryAchilles' heel

Fun Fact

"Stygian" — meaning dark, gloomy, or infernal — comes from this river. It's one of the most evocative adjectives in English.

Words We Inherited

English words and phrases that trace back to this myth:

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