psychasthenia

/ˌsaɪkəsˈθiniə/
noun
  1. A mental condition characterized by extreme anxiety, obsessive thoughts, and irrational fears.
    • The therapist explained that psychasthenia often involves a constant feeling of dread.
    • People with psychasthenia may struggle with repetitive, unwanted thoughts.
    • Her psychasthenia made it hard for her to leave the house without checking the locks ten times.