monomania به انگلیسی
From Longman Dictionary
mon‧o‧ma‧ni‧a /ˌmɒnəʊˈmeɪniə $ ˌmɑːnoʊ-/ noun [uncountable]
a very strong interest in one particular idea or subject which prevents you from thinking about anything else
Example
an obsession with food that verged on monomania
She has an obsession with the drug that verges on monomania
Such monomania has been useful to warriors since long before the silicon age
Thus, finally, Ahab recognizes the monomania of his pursuit, but can do nothing about it
Can I explain to her that I am fully in sympathy with their monomania