disastrous

disastrous
    adj 1: (of events) having extremely unfortunate or dire
           consequences; bringing ruin; "the stock market crashed on
           Black Friday"; "a calamitous defeat"; "the battle was a
           disastrous end to a disastrous campaign"; "such
           doctrines, if true, would be absolutely fatal to my
           theory"- Charles Darwin; "it is fatal to enter any war
           without the will to win it"- Douglas MacArthur; "a
           fateful error" [syn: {black}, {calamitous}, {disastrous},
           {fatal}, {fateful}]
    

Disastrous \Dis*as"trous\, a. [Cf. F. d['e]sastreux. See
   {Disaster}.]
   1. Full of unpropitious stellar influences; unpropitious;
      ill-boding. [Obs.]
      [1913 Webster]

            The moon
            In dim eclipse, disastrous twilight sheds. --Milton.
      [1913 Webster]

   2. Attended with suffering or disaster; very unfortunate;
      calamitous; ill-fated; ending in utter failure or ruin;
      as, a disastrous day; a disastrous termination of an
      undertaking.
      [1913 Webster]

            Wherein I spake of most disastrous chances. --Shak.
      -- {Dis*as"trous*ly}, adv. -- {Dis*as"trous*ness}, n.
      [1913 Webster]
    

63 Moby Thesaurus words for "disastrous":
      appalling, awful, baneful, black, calamitous, cataclysmal,
      cataclysmic, catastrophic, consuming, consumptive, convulsive,
      deadly, demolishing, demolitionary, depredatory, desolating,
      destroying, destructive, detrimental, devastating, dire, doomful,
      dreadful, fatal, fateful, fratricidal, grievous, hapless, harmful,
      harrowing, herky-jerky, horrendous, horrible, horrifying,
      internecine, jerky, luckless, nihilist, nihilistic, orgasmic,
      paroxysmal, ravaging, ruining, ruinous, seismic, self-destructive,
      spasmodic, spastic, subversionary, subversive, suicidal, terrible,
      tragic, unfortunate, unlucky, upheaving, vandalic, vandalish,
      vandalistic, wasteful, wasting, withering, wreckful