Harmful to living things:
— Deleterious chemical additives.

synonyms: hurtful, injurious.

Roget 649: hurtful, harmful, scathful^†, baneful, baleful; injurious, deleterious, detrimental, noxious, pernicious, mischievous, full of mischief, mischief-making, malefic, malignant, nocuous, noisome; prejudicial; disserviceable^†, disadvantageous; wide-wasting.    unlucky, sinister; obnoxious; untoward, disastrous.    oppressive, burdensome, onerous; malign etc. (malevolent) 907.    corrupting etc. (corrupt) etc. 659; virulent, venomous, envenomed, corrosive; poisonous etc. (morbific) 657^†; deadly etc. (killing) 361; destructive etc. (destroying) 162; inauspicious etc. 859.    bad, ill, arrant, as bad as bad can be, dreadful; horrid, horrible; dire; rank, peccant, foul, fulsome; rotten, rotten at the core.    vile, base, villainous; mean etc. (paltry) 643; injured &c.; deteriorated etc. 659; unsatisfactory, exceptionable indifferent; below par etc. (imperfect) 651; illcontrived, ill-conditioned; wretched, sad, grievous, deplorable, lamentable; pitiful, pitiable, woeful etc. (painful) 830.    evil, wrong; depraved etc. 945; shocking; reprehensible etc. (disapprove) 932.    hateful, hateful as a toad; abominable, detestable, execrable, cursed, accursed, confounded; damned, damnable; infernal; diabolic etc. (malevolent) 907.    unadvisable etc. (inexpedient) 647; unprofitable etc. (useless) 645; incompetent etc. (unskillful) 699; irremediable etc. (hopeless) 859.    ... show more

Roget 657: insalubrious; unhealthy, unwholesome; noxious, noisome; morbific^†, morbiferous^†; mephitic, septic, azotic^†, deleterious; pestilent, pestiferous, pestilential; virulent, venomous, envenomed; poisonous, toxic, toxiferous^†, teratogenic; narcotic.    contagious, infectious, catching, taking, epidemic, zymotic^†; epizootic.    innutritious^†, indigestible, ungenial; uncongenial etc. (disagreeing) 24.    deadly etc. (killing) 361.    ... show more

Roget 659: unimproved etc. (improve) etc. 658; deteriorated etc. v.; altered, altered for the worse; injured etc. v.; sprung; withering, spoiling etc. v.; on the wane, on the decline; tabid^†; degenerate; marescent^†; worse; the worse for, all the worse for; out of repair, out of tune; imperfect etc. 651; the worse for wear; battered; weathered, weather-beaten; stale, passe, shaken, dilapidated, frayed, faded, wilted, shabby, secondhand, threadbare; worn, worn to a thread, worn to a shadow, worn to the stump, worn to rags; reduced, reduced to a skeleton; far gone; tacky [U.S.].    decayed etc. v.; moth-eaten, worm-eaten; mildewed, rusty, moldy, spotted, seedy, time-worn, moss-grown; discolored; effete, wasted, crumbling, moldering, rotten, cankered, blighted, tainted; depraved etc. (vicious) 945; decrepid^†, decrepit; broke, busted, broken, out of commission, hors de combat [Fr.], out of action, broken down; done, done for, done up; worn out, used up, finished; beyond saving, fit for the dust hole, fit for the wastepaper basket, past work etc. (useless) 645.    at a low ebb, in a bad way, on one's last legs; undermined, deciduous; nodding to its fall etc. (destruction) 162; tottering etc. (dangerous) 665; past cure etc. (hopeless) 859; fatigued etc. 688; retrograde etc. (retrogressive) 283; deleterious etc. 649.    ... show more