wist·ful 
/ˈwɪstfəl/ adjective
/ˈwɪstfəl/ adjective [more wistful; most wistful] : having or showing sad thoughts and feelings about something that you want to have or do and especially about something that made you happy in the past
▪ She was wistful for a moment, then asked, “Do you remember the old playground?” ▪ He had a wistful look on his face.
▪ She was wistful for a moment, then asked, “Do you remember the old playground?” ▪ He had a wistful look on his face.
— wist·ful·ly adverb
▪ He gazed at her wistfully.
▪ He gazed at her wistfully.
— wist·ful·ness noun [noncount]
