The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Hellenic*ə-
- Ancient Greekἀν- (an-)
- Proto-Indo-European*h₃reǵ-
- Proto-Indo-European*h₃réǵeti
- Ancient Greekὀρέγω (orégō)
- Ancient Greekὄρεξῐς (órexĭs)
- Ancient Greekἀνορεξία (anorexía)
- English todayanorexia
Learned borrowing from Ancient Greek ἀνορεξία (anorexía), from ἀν- (an-, “not”, alpha privativum) + ὄρεξῐς (órexĭs, “yearning”) + -ῐ́ᾱ (-ĭ́ā, abstract-noun-forming suffix).
Etymology from Wiktionary, CC BY-SA 4.0.