ruinous

ruinous
    adj 1: extremely harmful; bringing physical or financial ruin;
           "a catastrophic depression"; "catastrophic illness"; "a
           ruinous course of action" [syn: {catastrophic},
           {ruinous}]
    2: causing injury or blight; especially affecting with sudden
       violence or plague or ruin; "the blasting effects of the
       intense cold on the budding fruit"; "the blasting force of
       the wind blowing sharp needles of sleet in our faces"; "a
       ruinous war" [syn: {blasting}, {ruinous}]
    

Ruinous \Ru"in*ous\, a. [L. ruinosus: cf. F. ruineux. See
   {Ruin}.]
   1. Causing, or tending to cause, ruin; destructive; baneful;
      pernicious; as, a ruinous project.
      [1913 Webster]

            After a night of storm so ruinous.    --Milton.
      [1913 Webster]

   2. Characterized by ruin; ruined; dilapidated; as, an
      edifice, bridge, or wall in a ruinous state.
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   3. Composed of, or consisting in, ruins.
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            Behold, Damascus . . . shall be a ruinous heap.
                                                  --Isa. xvii.
                                                  1.
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   Syn: Dilapidated; decayed; demolished; pernicious;
        destructive; baneful; wasteful; mischievous.
        [1913 Webster] -- {Ru"in*ous*ly}, adv. --
        {Ru"in*ous*ness}, n.
        [1913 Webster]
    

158 Moby Thesaurus words for "ruinous":
      ablative, annihilative, ausgespielt, baleful, baneful, bankrupt,
      battered, beat-up, beaten up, bedraggled, biodegradable, black,
      blasted, blighted, blowzy, broken, broken-down, calamitous,
      careless, cataclysmal, cataclysmic, catastrophic, chintzy,
      consuming, consumptive, corrosive, crippling, crumbling, deadly,
      decomposable, decomposing, decrepit, degradable, deleterious,
      demolishing, demolitionary, depredatory, derelict, desolated,
      desolating, destroyed, destroying, destructive, devastated,
      devastating, dilapidated, dire, disastrous, disintegrable,
      disintegrated, disintegrating, disintegrative, disjunctive,
      disruptive, done for, done in, doomful, down-and-out,
      drabbletailed, draggled, draggletailed, dusty, erosive, fallen,
      fatal, fateful, finished, fratricidal, frowzy, frumpish, frumpy,
      fusty, gone to pot, gone to seed, grievous, grubby, harmful,
      in rags, in ruins, informal, injurious, internecine, irremediable,
      kaput, loose, lumpen, messy, mildewed, moldering, moldy,
      moss-grown, moth-eaten, mussy, musty, nasty, negligent, nihilist,
      nihilistic, noxious, overthrown, pernicious, poisonous, poky,
      ragged, raggedy, ramshackle, ravaged, ravaging, resolvent, ruined,
      ruining, run-down, rusty, scraggly, seedy, self-destructive,
      separative, shabby, shattering, shoddy, slack, slatternly,
      slipshod, sloppy, slovenly, slummy, sluttish, solvent, sordid,
      spoiled, squalid, stale, subversionary, subversive, suicidal,
      tacky, tattered, time-scarred, timeworn, tottery, toxic, tragic,
      tumbledown, undone, unkempt, unneat, unsightly, untidy, vandalic,
      vandalish, vandalistic, wasted, wasteful, wasting, withering, worn,
      wrecked, wreckful