swain swain /ˈsweɪn/

noun

1. [Archaic] A man who is the lover of a man or woman  ( boyfriend , fellow , swain [Archaic] , beau [Archaic] , boyf [Informal, British] )
   a man who is the lover of a man or woman
    If I'd known he was her boyfriend I wouldn't have asked
   if I'd known he was her boyfriend I wouldn't have asked
    When the law changed, Pet could finally married his long-time boyfriend Jim
   When the law changed, Pet could finally married his long-time boyfriend Jim