monomaniacal

/ˌmɑnoʊməˈnaɪəkəl/
adjective
  1. Having or showing an excessive or obsessive interest in a single subject or idea.
    • His monomaniacal devotion to the project made him ignore everything else.
    • Her monomaniacal focus on winning the contest alienated her friends.
    • The inventor's monomaniacal pursuit of a perpetual motion machine consumed his life.
Antonyms
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