Where does “smīkā” come from?

smīkā (Proto-Italic) comes from Proto-Indo-European smēyg-, from Proto-Indo-European smē- — to rub; smear.

Ancestry of “smīkā”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	smēyg-	small, delicate, thin; twig, pole; crumb; small,...
2	Proto-Indo-European	smē-	to rub; smear

smīkā — Etymology, Origin & Word History | Etymology Explorer