ruuansulatuselimistö (Finnish) comes from Finnish ruuansulatus, from Finnish sulatus, from Finnish sulattaa, from Finnish -ttaa, from Proto-Finnic -ttadak, from Proto-Uralic -kta-.
Ancestry of “ruuansulatuselimistö”, step by step
ruuansulatuselimistö traces back through two separate lines of ancestry.