sad

/ˈsad/

Middle English, from Old English sæd sated; akin to Old High German sat sated, Latin satis enough

adjective

  1. affected with or expressive of grief or unhappiness : downcast

  2. causing or associated with grief or unhappiness : depressing

  3. regrettable, deplorable

abbreviation

  1. seasonal affective disorder

noun

  1. a blundering, inept person

… a sad sack so unlucky in love that when his girlfriend splits, his family sides with her.