noun, noun which may take the genitive case particle 'no'
obsession with cleanliness; fastidiousness
Describes a personality trait of being excessively concerned with cleanliness and order; often used in psychological or everyday contexts.
He is so fastidious that he can't stand even a single speck of dust in his room.
People with an obsession with cleanliness may extremely dislike using public restrooms.
Compound of 潔癖 (fastidiousness) + 性 (nature, disposition). The exact historical derivation is uncertain, but the word is conventionally associated with a personality trait of excessive cleanliness.