metamorphosis, transformation · abnormality · short for 変態性欲 (hentai seiyoku, “sexual perversion”)
köken: First used as an entomological term in publications by the Entomological Society of Japan, with later non-entomological applications in the broader zoology and botany. The narrower sense, "abnormal" is attested in Chinese works, such as those by Mao Dun; but the strictest sense, "abnormal sexual tendency," - from a contraction of 変態性欲 (hentai seiyoku, literally “abnormal sexual desire”) - may…
Borrowed from English maniac + -s or French maniaque + -s, from Late Latin maniacus, from Ancient Greek μανιακός (maniakós), adjectival form of μανία (manía, “madness”).