Where does “sisäfile” come from?

sisäfile (Finnish) comes from Finnish sisä-, from Proto-Finnic sicä, from Proto-Uralic śićä.

Ancestry of “sisäfile”, step by step

StepLanguageWordMeaning
1Finnishsisä-inner, internal, interior, inward; indoor; inland
2Proto-Finnicsicäinsides, inside
3Proto-Uralicśićä—
Every word from Proto-Uralic śićä →Every word from Finnish sisä- →Every word from Proto-Finnic sicä →