Where does “tus efanvos” come from?

tus efanvos (Cornish) comes from Cornish efanvos, from Cornish bos, from English Bush, from Middle English bush, from Old English busċ, from Latin bosca, from Late Latin busca, from Proto-West Germanic busk — to become, grow, appear.

Ancestry of “tus efanvos”, step by step

tus efanvos traces back through two separate lines of ancestry.

via Cornish efanvos

StepLanguageWordMeaning
1Cornishefanvosspace (astronomical)
2Cornishbosto be
3EnglishBushA place name
4Middle Englishbushgrove, wood; thicket, underbrush; bush; branch of...
5Old Englishbusċ
6Latinboscafirewood
7Late Latinbusca
8Proto-West Germanicbuskbush, thicket
9Proto-Germanicbuskazbush; thicket
10Proto-Indo-EuropeanbʰuH-to become, grow, appear

via Cornish tus

StepLanguageWordMeaning
1Cornishtusmen; people, persons
2Proto-Brythonictʉdpeople
3Proto-Celtictoutāpeople, tribe; tribal land
4Proto-Indo-Europeantewtéh₂people, tribe
5Proto-Indo-Europeantewh₂-to swell; to crowd; to be strong
Every word from Proto-Indo-European bʰuH-