quirk

/kwɜrk/
noun
  1. A peculiar or unusual habit, trait, or feature of a person or thing.
    • One of his quirks is that he always eats dessert before the main course.
    • The old house has a charming quirk: a hidden staircase behind the bookshelf.
    • Her quirk of humming while thinking made her easily recognizable in the office.
  2. An unexpected twist or turn, especially in a story or situation.
    • By a quirk of fate, they met again ten years later in a different country.
    • A quirk in the schedule caused the two events to overlap.
    • The plot had a strange quirk that surprised all the readers.
  3. A narrow groove or channel cut into a surface, especially in woodworking or architecture.
    • The quirk in the molding added a subtle shadow line to the room.
    • He used a special tool to cut a clean quirk in the wooden frame.
    • The carpenter carved a quirk along the edge of the table for decoration.
Antonyms
verb
  1. To move or twist suddenly, especially in a quick, jerky manner.
    • The dog quirked its head to one side, listening to the strange sound.
    • His mouth quirked into a half-smile as he read the joke.
    • She quirked an eyebrow when she heard the surprising news.