The story
- Proto-Indo-European*men-
- Proto-Indo-European*mn̥yétor
- Proto-Hellenic*məňňómai
- Ancient Greekμαίνομαι (maínomai)
- Ancient Greekμᾰνῐ́ᾱ (mănĭ́ā)
- Ancient Greekμανικός (manikós)
- English todaymanic
From mania + -ic; Ancient Greek μανικός (manikós). Compare maniac.
Etymology from Wiktionary, CC BY-SA 4.0.