Deadly

• POS: Adjective, Adverb
• HYPHEN: dead=ly

OXFORD DICTIONARY

Deadly, adj. & adv.
--adj. (deadlier, deadliest)
1 a causing or able to cause fatal injury or serious damage. b poisonous (deadly snake).
2 intense, extreme (deadly dullness).
3 (of an aim etc.) extremely accurate or effective.
4 deathlike (deadly pale; deadly faintness; deadly gloom).
5 colloq. dreary, dull.
6 implacable.
--adv.
1 like death; as if dead (deadly faint).
2 extremely, intensely (deadly serious).

Idiom

deadly nightshade = BELLADONNA. deadly sin a sin regarded as leading to damnation, esp. pride, covetousness, lust, gluttony, envy, anger, and sloth.

Derivative

deadliness n.

Etymology

OE deadlic, deadlice (as DEAD, -LY(1))

THESAURUS

Deadly

a la mort, abominably, accurate, agonizingly, ashen, awful, awfully, baldly, baleful, balefully, baneful, barbaric, barbarous, bitterly, blatantly, bloodthirsty, blue, boring, brashly, brutal, cadaverous, calamitous, cataclysmal, cataclysmic, catastrophic, catching, cold-blooded, communicable, confoundedly, consuming, consumptive, contagious, corpselike, corroding, corrosive, corrupting, corruptive, counterproductive, cruelly, damaging, damnably, dangerous, dead, deadened, death-bringing, deathful, deathlike, deathly, deathly pale, deleterious, demolishing, demolitionary, depredatory, desolating, destroying, destructive, detrimental, deucedly, devastating, disadvantageous, disastrous, disserviceable, distressing, distressingly, dolorously, doomful, dreadful, dreadfully, dreary, dull, eerie, egregiously, envenomed, exact, excessively, excruciating, excruciatingly, exorbitantly, extravagantly, fatal, fateful, fearful, feral, ferocious, flagrantly, fratricidal, frightful, frightfully, ghastly, ghostlike, ghostly, grievously, grisly, gruesome, haggard, harmful, heartless, hellishly, homicidal, horrible, horribly, howling, humdrum, hurtful, implacable, improperly, inexcusably, infectious, infective, infernally, inhuman, injurious, inordinately, internecine, intolerably, killing, lamentably, lethal, livid, lurid, macabre, malefic, malevolent, malign, malignant, mephitic, merciless, miasmal, miasmatic, miasmic, mischievous, miserably, mortal, mortuary, murderous, nakedly, nihilist, nihilistic, noisome, noxious, ominous, openly, painfully, pale, pallid, pernicious, pestiferous, pestilent, pestilential, piteously, pitiless, poisonous, precise, prejudicial, ravaging, rousing, ruining, ruinous, ruthless, sadly, savage, scatheful, self-destructive, shatteringly, shockingly, slaying, something awful, something fierce, sorely, staggeringly, subversionary, subversive, suicidal, tedious, terrible, terribly, terrific, thumping, tiresome, to the death, torturously, toxic, toxicant, toxiferous, true, unashamedly, unbearably, uncanny, unconscionably, unduly, unearthly, unerring, unfailing, unpardonably, vandalic, vandalish, vandalistic, venenate, veneniferous, venenous, venomous, vicious, virulent, wan, wasteful, wasting, wearisome, wearying, weird, whacking, white, withering, woefully

ROGET THESAURUS

Deadly

Badness

N badness, hurtfulness, virulence, evil doer, bane, plague spot, evil star, ill wind, hoodoo, Jonah, snake in the grass, skeleton in the closet, amari aliquid, thorn in the side, malignity, malevolence, tender mercies, ill-treatment, annoyance, molestation, abuse, oppression, persecution, outrage, misusage, injury, knockout drops, badness, peccancy, abomination, painfulness, pestilence, guilt, depravity, 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, corrupting &c (corrupt), virulent, venomous, envenomed, corrosive, poisonous, deadly, destructive, inauspicious, 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, injured, deteriorated, unsatisfactory, exceptionable indifferent, below par, illcontrived, ill-conditioned, wretched, sad, grievous, deplorable, lamentable, pitiful, pitiable, woeful, evil, wrong, depraved, shocking, reprehensible, hateful, hateful as a toad, abominable, detestable, execrable, cursed, accursed, confounded, damned, damnable, infernal, diabolic, unadvisable, unprofitable, incompetent, irremediable, badly, wrong, ill, to one's cost, where the shoe pinches, bad is the best: the worst come to the worst, herba mala presto cresco, wrongs unredressed or insults unavenged.

Insalubrity

N insalubrity, unhealthiness, nonnaturals, plague spot, malaria, death in the pot, contagion, toxicity, 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, deadly.

Destruction

N destruction, waste, dissolution, breaking up, diruption, disruption, consumption, disorganization, fall, downfall, devastation, ruin, perdition, crash, eboulement, smash, havoc, delabrement, debacle, break down, break up, fall apart, prostration, desolation, bouleversement, wreck, wrack, shipwreck, cataclysm, washout, extinction, annihilation, destruction of life, knock-down blow, doom, crack of doom, destroying, demolition, demolishment, overthrow, subversion, suppression, abolition, biblioclasm, sacrifice, ravage, razzia, inactivation, incendiarism, revolution, extirpation, beginning of the end, commencement de la fin, road to ruin, dilapidation, sabotage, destroyed, perishing, trembling to its fall, nodding to its fall, tottering to its fall, in course of destruction, extinct, all-destroying, all-devouring, all-engulfing, destructive, subversive, ruinous, devastating, incendiary, deletory, destroying, suicidal, deadly, with crushing effect, with a sledge hammer, delenda est Carthago, dum Roma deliberat Saguntum perit, ecrasez l'infame.

Death

N death, decease, demise, dissolution, departure, obit, release, rest, quietus, fall, loss, bereavement, mortality, morbidity, end of life &c, cessation of life &c, loss of life, extinction of life, ebb of life, death warrant, death watch, death rattle, death bed, stroke of death, agonies of death, shades of death, valley of death, jaws of death, hand of death, last breath, last gasp, last agonies, dying day, dying breath, dying agonies, chant du cygne, rigor mortis, Stygian shore, King of terrors, King Death, Death, doom, Hell's grim Tyrant, euthanasia, break up of the system, natural death, natural decay, sudden death, violent death, untimely end, watery grave, debt of nature, suffocation, asphyxia, fatal disease, death blow, necrology, bills of mortality, obituary, death song, dead, lifeless, deceased, demised, departed, defunct, extinct, late, gone, no more, exanimate, inanimate, out of the world, taken off, released, departed this life, dead and gone, dead as a doornail, dead as a doorpost, dead as a mutton, dead as a herring, dead as nits, launched into eternity, gone to one's eternal reward, gone to meet one's maker, pushing up daisies, gathered to one's fathers, numbered with the dead, dying, moribund, morient, hippocratic, in articulo, in extremis, in the jaws of death, in the agony of death, going off, aux abois, one one's last legs, on one's death bed, at the point of death, at death's door, at the last gasp, near one's end, given over, booked, with one foot in the grave, tottering on the brink of the grave, stillborn, mortuary, deadly, post obit, post mortem, life ebbs, life fails, life hangs by a thread, one's days are numbered, one's hour is come, one's race is run, one's doom is sealed, Death knocks at the door, Death stares one in the face, the breath is out of the body, the grave closes over one, sic itur ad astra, de mortuis nil nisi bonum, dulce et decorum est pro patria mori, honesta mors turpi vita potior, in adamantine chains shall death be bound, mors ultima linea rerum est, ominia mors aequat, Spake the grisly Terror, the lone couch of this everlasting sleep, nothing is certain but death and taxes.

Killing

N killing, homicide, manslaughter, murder, assassination, trucidation, iccusion, effusion of blood, blood, blood shed, gore, slaughter, carnage, butchery, battue, massacre, fusillade, noyade, thuggery, Thuggism, deathblow, finishing stroke, coup de grace, quietus, execution, judicial murder, martyrdom, butcher, slayer, murderer, Cain, assassin, terrorist, cutthroat, garroter, bravo, Thug, Moloch, matador, sabreur, guet-a-pens, gallows, executioner, man-eater, apache, hatchet man, highbinder, regicide, parricide, matricide, fratricide, infanticide, feticide, foeticide, uxoricide, vaticide, suicide, felo de se, hara-kiri, suttee, Juggernath, immolation, auto da fe, holocaust, suffocation, strangulation, garrote, hanging, lapidation, deadly weapon, Aceldama, slaughtering, phthisozoics, sport, sporting, the chase, venery, hunting, coursing, shooting, fishing, pig- sticking, sportsman, huntsman, fisherman, hunter, Nimrod, slaughterhouse, meat packing plant, shambles, abattoir, fatal accident, violent death, casualty, killing, murderous, slaughterous, sanguinary, sanguinolent, blood stained, blood thirsty, homicidal, red handed, bloody, bloody minded, ensanguined, gory, thuggish, mortal, fatal, lethal, dead, deadly, mortiferous, lethiferous, unhealthy internecine, suicidal, sporting, piscatorial, piscatory, in at the death, assassination has never changed the history of the.