wistfulness

noun

1. (uncountable, usually)The state or characteristic of being wistful.

   “She was no longer the alert, vivacious American beauty who had charmed and delighted all who came in contact with her. Instead she was a very quiet and sad little girl—with an expression of hopeless wistfulness that none but Hazel Strong could interpret.”

   “It’s a lovely sequence cut too short because the show seems afraid to give itself over to romance and whimsy and wistfulness when it has wedgie jokes to deliver.”