Where does “tyrmäysisku” come from?

tyrmäysisku (Finnish) comes from Finnish tyrmäys, from Finnish tyrmätä, from Finnish tyrmä, from Russian тюрьма́, from Old East Slavic тюрма, from Proto-Turkic türmä — prison.

tyrmäysisku (Finnish): knockout blow, Sunday punch

Definitions

knockout blow, Sunday punch

Ancestry of “tyrmäysisku”, step by step

tyrmäysisku traces back through two separate lines of ancestry.

via Finnish tyrmäys

Step	Language	Word	Meaning
1	Finnish	tyrmäys	knockout
2	Finnish	tyrmätä	To stun, knock out; to reject, belittle or...
3	Finnish	tyrmä	dungeon; stiff, harsh, unfriendly, wretched, poor
4	Russian	тюрьма́	prison, jail
5	Old East Slavic	тюрма	—
6	Proto-Turkic	türmä	prison

via Finnish isku

Step	Language	Word	Meaning
1	Finnish	isku	hit, blow; impact; attentat, attack, strike, raid
2	Finnish	-u	Forms nouns from verbs. Most common with "e"- and...
3	Proto-Finnic	-u	Forms nouns from adjectives, nouns

Every word from Proto-Turkic türmä →Every word from Old East Slavic тюрма →Every word from Russian тюрьма́ →