Where does “macule” come from?

macule (French) comes from Latin Macula, from Proto-Indo-European smh₁-tleh₂, from Proto-Indo-European smeh₁- — smear, rub.

macule (French): stain; first-person singular present indicative...

Definitions

Step	Language	Word	Meaning
1	Latin	Macula	—
2	Proto-Indo-European	smh₁-tleh₂	—
3	Proto-Indo-European	smeh₁-	smear, rub

macule — Etymology, Origin & Word History | Etymology Explorer