Where does “kasteliero” come from?

kasteliero (Finnish) comes from Finnish kaste, from Proto-Finnic kastek, from Proto-Finnic kastadak, from Proto-Finnic -tadak, from Proto-Uralic -ta- — Forms verbs from nouns; Forms causative verbs...

Ancestry of “kasteliero”, step by step

kasteliero traces back through two separate lines of ancestry.

via Finnish kaste

StepLanguageWordMeaning
1Finnishkastedew; baptism, christening
2Proto-Finnickastekdew
3Proto-Finnickastadakto wet, to soak; to dip, to immerse
4Proto-Finnic-tadakForms verbs from both nominal and verbal stems
5Proto-Uralic-ta-Forms verbs from nouns; Forms causative verbs...

via Finnish liero

StepLanguageWordMeaning
1Finnishlieroearthworm; jackal, skunk
2Finnish-oForms result or action nouns from verbs; Forms...
3Proto-Finnic-oForms action/result nouns from verbs
4Proto-Uralic-w—
Every word from Proto-Uralic -ta- →Every word from Proto-Finnic -tadak →Every word from Proto-Finnic kastadak →