Where does “soxta-” come from?

soxta- (Proto-Finnic) comes from Proto-Uralic suxe-, from Proto-Indo-European sewh₁- — to press, push.

Ancestry of “soxta-”, step by step

StepLanguageWordMeaning
1Proto-Uralicsuxe-to row
2Proto-Indo-Europeansewh₁-to press, push
Every word from Proto-Indo-European sewh₁-Every word from Proto-Uralic suxe-