Where does “cheiroso” come from?

cheiroso (Portuguese) comes from Portuguese cheiro, from Portuguese cheirar, from Old Portuguese cheirar, from Latin frāgrō, from Proto-Italic frāgrāō, from Proto-Indo-European bʰreh₂gro-, from Proto-Indo-European bʰreh₂g- — to smell.

cheiroso (Portuguese): Having a good, pleasant smell; sweet-smelling;...

Definitions

Having a good, pleasant smell; sweet-smelling;...

Ancestry of “cheiroso”, step by step

Step	Language	Word	Meaning
1	Portuguese	cheiro	smell
2	Portuguese	cheirar	to smell; to smell of; to snort
3	Old Portuguese	cheirar	to smell
4	Latin	frāgrō	to emit a smell of, to smell of, to be redolent of, to reek of
5	Proto-Italic	frāgrāō	—
6	Proto-Indo-European	bʰreh₂gro-	—
7	Proto-Indo-European	bʰreh₂g-	to smell

Every word from Proto-Indo-European bʰreh₂g- →Every word from Proto-Indo-European bʰreh₂gro- →Every word from Proto-Italic frāgrāō →