Where does “lukuhäiriö” come from?

lukuhäiriö (Finnish) comes from Finnish häiriö, from Finnish häiritä, from Proto-Finnic häirit'äk, from Proto-Germanic sairijaną, from Proto-Germanic sairą, from Proto-Germanic sairaz, from Proto-Indo-European seh₂yro-, from Proto-Indo-European seh₂y- — to bind; to be fierce, afflict; to tie, bind.

Ancestry of “lukuhäiriö”, step by step

lukuhäiriö traces back through two separate lines of ancestry.

via Finnish häiriö

StepLanguageWordMeaning
1Finnishhäiriödisorder, trouble; interference, disturbance,...
2Finnishhäiritäto disturb, bother, bug; to disrupt
3Proto-Finnichäirit'äk
4Proto-Germanicsairijanąto wound, to make hurt
5Proto-Germanicsairąwound; sore
6Proto-Germanicsairazsore, painful
7Proto-Indo-Europeanseh₂yro-
8Proto-Indo-Europeanseh₂y-to bind; to be fierce, afflict; to tie, bind

via Finnish luku

StepLanguageWordMeaning
1Finnishlukunumber, count, quantity; chapter; reading
2Proto-Finniclukunumber, quantity
3Proto-Finniclukedakto count; to read ?
4Proto-Uralicluke-to count
5Proto-Indo-Europeanleǵ-to gather, collect, with derivatives meaning to...
Every word from Proto-Indo-European seh₂y-Every word from Proto-Indo-European seh₂yro-Every word from Proto-Germanic sairaz
lukuhäiriö — Etymology, Origin & Word History | Etymology Explorer