Where does “kirjainlaji” come from?

kirjainlaji (Finnish) comes from Finnish laji, from Old Swedish slagh, from Middle Low German slach, from Old Saxon slag, from Proto-West Germanic slagi, from Swedish slagg, from Low German slagge, from Middle Low German slagge — to hit; strike; to hit, strike, throw; to hit,...

Ancestry of “kirjainlaji”, step by step

kirjainlaji traces back through two separate lines of ancestry.

via Finnish laji

StepLanguageWordMeaning
1Finnishlajikind, sort; species; sport
2Old Swedishslagh
3Middle Low Germanslach
4Old Saxonslag
5Proto-West Germanicslagiblow, strike
6Swedishslaggslag metallurgical waste material
7Low Germanslagge
8Middle Low Germanslagge
9Middle Low Germanslānto hit, strike
10Old Saxonslāhanto hit
11Proto-West Germanicslahanto hit, to strike; to kill
12Proto-Germanicslahanąto hit, to strike; to kill
13Proto-Indo-Europeanslak-to hit; strike; to hit, strike, throw; to hit,...

via Finnish kirjain

StepLanguageWordMeaning
1Finnishkirjainletter; Genitive plural form of kirja
2Finnishkirjatato book, log, register; to register
3Finnishkirjabook; quire
4Proto-Finnickirjadecoration, carving, pattern
Every word from Proto-Indo-European slak-Every word from Proto-Germanic slahanąEvery word from Proto-West Germanic slahan