maniaque

maniacal, mental; obsessive-compulsive, OCD; fastidious, fussy, house-proud

Learned borrowing from Late Latin maniacus, itself a borrowing from Ancient Greek μανιακός (maniakós), adjectival form of μανία (manía, “madness”). By surface analysis, manie + -aque.

maniac (insane person); person obsessed with something, fanatic about something; neat freak, clean freak

“un maniaque du rangement, un maniaque de la propreté” — a neat freak, a clean freak

Learned borrowing from Late Latin maniacus, itself a borrowing from Ancient Greek μανιακός (maniakós), adjectival form of μανία (manía, “madness”). By surface analysis, manie + -aque.