wistful

 
Pronunciation: /ˈwɪs(t)fʊl, -f(ə)l/

adjective

  • having or showing a feeling of vague or regretful longing: a wistful smile

Derivatives

wistfully

adverb

wistfulness

noun

Origin:

early 17th century: apparently from obsolete wistly 'intently', influenced by wishful