niceness

/ˈnaɪsnəs/
noun
  1. The quality of being kind, friendly, or pleasant.
    • Her niceness made everyone feel welcome.
    • I appreciate your niceness in helping me move.
    • The teacher's niceness encouraged the shy students to speak up.
  2. The quality of being precise or subtle; exactness.
    • The niceness of the measurement was crucial for the experiment.
    • He admired the niceness of the watch's craftsmanship.
    • The niceness of the legal argument impressed the judge.