Where does “обострение” come from?

обострение (Russian) comes from Russian обостри́ть, from Russian остри́ть, from Russian о́стрый, from Proto-Slavic ostrъ, from Proto-Balto-Slavic aśras, from Proto-Indo-European *h₂eḱrós, from Proto-Indo-European h₂eḱ- — sharp.

обострение (Russian): intensification, worsening, aggravation, exacerbation, sharpening

Definitions

  1. intensification, worsening, aggravation, exacerbation, sharpening

Ancestry of “обострение”, step by step

StepLanguageWordMeaning
1Russianобостри́тьto escalate, to intensify
2Russianостри́тьto sharpen, to whet
3Russianо́стрыйpointed, sharp; sharp, pointed
4Proto-Slavicostrъsharp
5Proto-Balto-Slavicaśrassharp
6Proto-Indo-European*h₂eḱróssharp
7Proto-Indo-Europeanh₂eḱ-sharp
Every word from Proto-Indo-European h₂eḱ- →Every word from Proto-Indo-European *h₂eḱrós →Every word from Proto-Balto-Slavic aśras →