
English word maniac comes from Ancient Greek μανία, and later French maniaque (Maniac (insane person) Maniacal.)
μανία (Ancient Greek)
μανιακός (Ancient Greek)
maniacus (Late Latin)
maniaque (French)
Maniac (insane person) Maniacal.
maniac (English)
A fanatic, a person with an obsession.. An insane person, especially one who suffers from a mania.