Monomania
Mental illness involving an unhealthily intense obsession with one specific thing
Monomania
In 19th-century psychiatry, monomania (from Greek monos, "one", and mania, meaning "madness" or "frenzy") was a form of partial insanity conceived as a single psychological obsession in an otherwise sound mind.
Read on Wikipedia · Image Théodore Géricault, Public domain
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