Where does “apostillar” come from?

apostillar (Spanish) comes from Spanish apostilla, from Spanish postilla, from Vulgar Latin pustella, from Latin pustula, from Finnish pus-, from Proto-Indo-European bew- — "low-pitch humming noise".

apostillar (Spanish): to annotate

Definitions

to annotate

Ancestry of “apostillar”, step by step

Step	Language	Word	Meaning
1	Spanish	apostilla	note, comment; apostille
2	Spanish	postilla	scab; postil, marginal note
3	Vulgar Latin	pustella	—
4	Latin	pustula	inflamed sore, blister, pustule
5	Finnish	pus-	—
6	Proto-Indo-European	bew-	"low-pitch humming noise"

Words derived from “apostillar”

apostillamiento

Every word from Proto-Indo-European bew- →Every word from Finnish pus- →Every word from Latin pustula →