Where does “αρρωσταίνω” come from?

αρρωσταίνω (Greek) comes from Greek άρρωστος, from Ancient Greek ἄρρωστος, from Ancient Greek ἀ-, from Proto-Hellenic hə-, from Proto-Indo-European sm̥-, from Proto-Indo-European sem- — together, one.

αρρωσταίνω (Greek): become ill; sicken, get sick

Definitions

become ill; sicken, get sick

Ancestry of “αρρωσταίνω”, step by step

Step	Language	Word	Meaning
1	Greek	άρρωστος	ill, sick; sickly; a sick man
2	Ancient Greek	ἄρρωστος	ill, sickly; morally feeble
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- →