Where does “смрдеа” come from?

смрдеа (Macedonian) comes from Proto-Slavic smordъ, from Proto-Balto-Slavic smorʔdos, from Proto-Indo-European smord-o-s.

смрдеа (Macedonian): stench

Definitions

Step	Language	Word	Meaning
1	Proto-Slavic	smordъ	stench
2	Proto-Balto-Slavic	smorʔdos	—
3	Proto-Indo-European	smord-o-s	—

смрдеа — Etymology, Origin & Word History | Etymology Explorer