Where does “*buky” come from?

*buky (Slavic) comes from Proto-West Germanic bōku, from Proto-Germanic bōkō, from Proto-Indo-European bʰeh₂ǵos — beech.

Ancestry of “*buky”, step by step

StepLanguageWordMeaning
1Proto-West Germanicbōkubeech
2Proto-Germanicbōkōbeech
3Proto-Indo-Europeanbʰeh₂ǵosbeech

Words derived from “*buky

Every word from Proto-Indo-European bʰeh₂ǵosEvery word from Proto-Germanic bōkōEvery word from Proto-West Germanic bōku