Where does “esijalka” come from?

esijalka (Ingrian) comes from Ingrian jalka, from Finnish -ttää, from Proto-Finnic -ttadak, from Proto-Uralic -kta-.

Ancestry of “esijalka”, step by step

StepLanguageWordMeaning
1Ingrianjalkaleg
2Finnish-ttääFront vowel variant of -ttaa
3Proto-Finnic-ttadakCreates causative verbs from regular verbs,...
4Proto-Uralic-kta-—
Every word from Proto-Uralic -kta- →Every word from Finnish -ttää →Every word from Proto-Finnic -ttadak →