Where does “mysteerinen” come from?

mysteerinen (Finnish) comes from Finnish mysteeri, from Latin mystērium, from Ancient Greek μυστήριον, from Ancient Greek μύστης, from Ancient Greek μυέω, from Ancient Greek -έω, from Proto-Indo-European -éyeti, from Proto-Indo-European -yeti — Creates transitive imperfective verbs from roots.

Ancestry of “mysteerinen”, step by step

mysteerinen traces back through two separate lines of ancestry.

via Finnish mysteeri

StepLanguageWordMeaning
1Finnishmysteerimystery
2Latinmystēriummystery (secret rite or worship)
3Ancient Greekμυστήριονrevealed secret; mystery, secret; object used in...
4Ancient Greekμύστηςone who has been initiated, initiate
5Ancient GreekμυέωI initiate
6Ancient Greek-έωUsed to form verbs from nouns, adjectives and...
7Proto-Indo-European-éyetiForms causative imperfective verbs from roots;...
8Proto-Indo-European-yetiCreates transitive imperfective verbs from roots

via Finnish inen

StepLanguageWordMeaning
1Finnishinen
Every word from Proto-Indo-European -yetiEvery word from Ancient Greek -έωEvery word from Proto-Indo-European -éyeti