Where does “атрофия” come from?

атрофия (Bulgarian) comes from Ancient Greek ἀτροφία, from Ancient Greek ἄτροφος, from Ancient Greek ἀ-, from Proto-Hellenic hə-, from Proto-Indo-European sm̥-, from Proto-Indo-European sem- — together, one.

атрофия (Bulgarian): atrophy

Definitions

atrophy

Ancestry of “атрофия”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἀτροφία	a wasting away; lack of food, hunger
2	Ancient Greek	ἄτροφος	ill-fed, un-nourished
3	Ancient Greek	ἀ-	The alpha privativum, used to make words that...
4	Proto-Hellenic	hə-	same; together
5	Proto-Indo-European	sm̥-	one; with, together
6	Proto-Indo-European	sem-	together, one

Every word from Proto-Indo-European sem- →Every word from Ancient Greek ἀ- →Every word from Proto-Indo-European sm̥- →