-phagia

From Ancient Greek -φαγία (-phagía) (compare -φαγος (-phagos, “eater”)), suffix corresponding to φαγεῖν (phageîn, “to eat”), infinitive of ἔφαγον (éphagon, “I eat”), which serves as aorist for the defective verb ἐσθίω (esthíō, “I eat”).

来源：wiktionary