Where does “suprafine” come from?

suprafine (English) comes from English fine, from German fein, from Middle High German fīn, from Old French fin, from Latin fīnis, from Proto-Indo-European dʰnh₂-.

Ancestry of “suprafine”, step by step

suprafine traces back through two separate lines of ancestry.

via English fine

Step	Language	Word	Meaning
1	English	fine	Senses referring to subjective quality; Senses...
2	German	fein	fine; fine; very good; as it should be; refined;...
3	Middle High German	fīn	—
4	Old French	fin	fine, delicate
5	Latin	fīnis	end
6	Proto-Indo-European	dʰnh₂-	—

via English supra

Step	Language	Word	Meaning
1	English	supra	Used to indicate that the current citation is...
2	Georgian	სუფრა	tablecloth; the table on which supra is conducted
3	Persian	سفره	tablecloth
4	Arabic	سُفْرَة	victuals; table, especially for eating

Every word from Proto-Indo-European dʰnh₂- →Every word from Latin fīnis →Every word from Old French fin →