Where does “syvällekäypä” come from?

syvällekäypä (Finnish) comes from Finnish käypä, from Finnish käydä, from Proto-Finnic käüdäk, from Proto-Finnic käwe-, from Proto-Germanic *skēwijaną — to go.

Ancestry of “syvällekäypä”, step by step

syvällekäypä traces back through two separate lines of ancestry.

via Finnish käypä

StepLanguageWordMeaning
1Finnishkäypäacceptable, going, valid, current; selling well;...
2Finnishkäydäto visit, go to (and return), attend (a place)
3Proto-Finnickäüdäkto walk, to go
4Proto-Finnickäwe-
5Proto-Germanic*skēwijanąto go

via Finnish syvä

StepLanguageWordMeaning
1Finnishsyvädeep; deep-water; deep, profound
2Proto-Finniccüvädeep
3Proto-Finno-Ugrictiwä
Every word from Proto-Germanic *skēwijanąEvery word from Proto-Finnic käwe-Every word from Proto-Finnic käüdäk