Where does “ústie” come from?

ústie (Old Czech) comes from Proto-Slavic ustьje, from Proto-Slavic ustà, from Proto-Indo-European h₃éh₁os — mouth.

Ancestry of “ústie”, step by step

StepLanguageWordMeaning
1Proto-Slavicustьjemouth, rivermouth
2Proto-Slavicustàlips, mouth
3Proto-Indo-Europeanh₃éh₁osmouth

Words derived from “ústie”

Every word from Proto-Indo-European h₃éh₁os →Every word from Proto-Slavic ustà →Every word from Proto-Slavic ustьje →