Where does “обостриться” come from?

обостриться (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.

обостриться (Russian): to become sharp; to become more sensitive/acute;...

Definitions

  1. to become sharp; to become more sensitive/acute;...

Ancestry of “обостриться”, 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 →
обостриться — Etymology, Origin & Word History | Etymology Explorer