Antonyms of fun :

Examples of usage:

  1. I didn't think it much fun then, and I don't now.
    "Imaginary Interviews", W. D. Howells.
  2. Wouldn't it be fun if we had a little store like that?
    "Bunny Brown and His Sister Sue Keeping Store", Laura Lee Hope.
  3. Let's have some good fun up here.
    "Marjorie's Vacation", Carolyn Wells.