Where does “bystrooki” come from?

bystrooki (Polish) comes from Polish oko, from Old Polish oko, from Proto-Slavic ȍko, from Proto-Balto-Slavic ak-, from Proto-Indo-European h₃ókʷs, from Proto-Indo-European h₃ekʷ- — to see; eye.

bystrooki (Polish): bright-eyed, sharp-eyed

Definitions

  1. bright-eyed, sharp-eyed

Ancestry of “bystrooki”, step by step

bystrooki traces back through two separate lines of ancestry.

via Polish oko

StepLanguageWordMeaning
1Polishokoeye; A drop of fat or oil floating on the surface...
2Old Polishokoeye
3Proto-Slavicȍkoeye
4Proto-Balto-Slavicak-eye
5Proto-Indo-Europeanh₃ókʷseye
6Proto-Indo-Europeanh₃ekʷ-to see; eye

via Polish Bystry

StepLanguageWordMeaning
1PolishBystrysmart; bright; shrewd
2Old Polishbystryrapid
3Proto-Slavicbystrъquick; penetrating, transparent
4Proto-Indo-Europeanbʰūsro-—
Every word from Proto-Indo-European h₃ekʷ- →Every word from Proto-Indo-European h₃ókʷs →Every word from Proto-Balto-Slavic ak- →