Where does “oštro” come from?

oštro (Serbo-Croatian) comes from Proto-Slavic ostrъ, from Proto-Balto-Slavic aśras, from Proto-Indo-European *h₂eḱrós, from Proto-Indo-European h₂eḱ- — sharp.

oštro (Serbo-Croatian): sharply

Definitions

  1. sharply

Ancestry of “oštro”, step by step

oštro traces back through two separate lines of ancestry.

via Proto-Slavic ostrъ

StepLanguageWordMeaning
1Proto-Slavicostrъsharp
2Proto-Balto-Slavicaśrassharp
3Proto-Indo-European*h₂eḱróssharp
4Proto-Indo-Europeanh₂eḱ-sharp

via Italian ostro

StepLanguageWordMeaning
1Italianostrosoutherly wind; "hence" the south; purple
2LatinausterThe south wind; south
3Proto-Italic*austeros—
Every word from Proto-Indo-European h₂eḱ- →Every word from Proto-Indo-European *h₂eḱrós →Every word from Proto-Balto-Slavic aśras →