Where does “teistisyys” come from?

teistisyys (Finnish) comes from Finnish teistinen, from Finnish teisti, from English theist, from English -ist, from Old French -iste, from Latin -ista, from Ancient Greek -ιστής, from Ancient Greek -τής.

Ancestry of “teistisyys”, step by step

StepLanguageWordMeaning
1Finnishteistinentheistic
2Finnishteistirock gunnel; theist
3EnglishtheistOne who believes in the existence of a god or...
4English-istAdded to words to form nouns denoting
5Old French-iste
6Latin-ista-ist; one who practises or believes
7Ancient Greek-ιστήςAlternative form of -τής; -ist
8Ancient Greek-τήςAppended to verbs to form agent nouns
9Proto-Hellenic-tās
Every word from Proto-Hellenic -tās