| dangerous | | |
| adj. | 1. dangerous, unsafe | involving or causing danger or risk; liable to hurt or harm.; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions" |
| ~ breakneck | moving at very high speed.; "a breakneck pace" |
| ~ chanceful, chancy, dicey, dodgy | of uncertain outcome; especially fraught with risk.; "an extremely dicey future on a brave new world of liquid nitrogen, tar, and smog" |
| ~ desperate | (of persons) dangerously reckless or violent as from urgency or despair.; "a desperate criminal"; "taken hostage of desperate men" |
| ~ hazardous, risky, wild | involving risk or danger.; "skydiving is a hazardous sport"; "extremely risky going out in the tide and fog"; "a wild financial scheme" |
| ~ insidious | intended to entrap. |
| ~ mordacious | biting or given to biting.; "they deliberately gave me a skittish and mordacious mount" |
| ~ on the hook | caught in a difficult or dangerous situation.; "there I was back on the hook" |
| ~ parlous, perilous, touch-and-go, precarious | fraught with danger.; "dangerous waters"; "a parlous journey on stormy seas"; "a perilous voyage across the Atlantic in a small boat"; "the precarious life of an undersea diver"; "dangerous surgery followed by a touch-and-go recovery" |
| ~ self-destructive, suicidal | dangerous to yourself or your interests.; "suicidal impulses"; "a suicidal corporate takeover strategy"; "a kamikaze pilot" |
| ~ treacherous, unreliable | dangerously unstable and unpredictable.; "treacherous winding roads"; "an unreliable trestle" |
| ~ unsafe, insecure | lacking in security or safety.; "his fortune was increasingly insecure"; "an insecure future" |
| ~ vulnerable | susceptible to attack.; "a vulnerable bridge" |
| adj. | 2. dangerous, grave, grievous, life-threatening, serious, severe | causing fear or anxiety by threatening great harm.; "a dangerous operation"; "a grave situation"; "a grave illness"; "grievous bodily harm"; "a serious wound"; "a serious turn of events"; "a severe case of pneumonia"; "a life-threatening disease" |
| ~ critical | being in or verging on a state of crisis or emergency.; "a critical shortage of food"; "a critical illness"; "an illness at the critical stage" |
| ghastly | | |
| adj. | 1. ghastly, grim, grisly, gruesome, macabre, sick | shockingly repellent; inspiring horror.; "ghastly wounds"; "the grim aftermath of the bombing"; "the grim task of burying the victims"; "a grisly murder"; "gruesome evidence of human sacrifice"; "macabre tales of war and plague in the Middle ages"; "macabre tortures conceived by madmen" |
| ~ alarming | frightening because of an awareness of danger. |
| adj. | 2. charnel, ghastly, sepulchral | gruesomely indicative of death or the dead.; "a charnel smell came from the chest filled with dead men's bones"; "ghastly shrieks"; "the sepulchral darkness of the catacombs" |
| ~ offensive | unpleasant or disgusting especially to the senses.; "offensive odors" |
| insecure | | |
| adj. | 1. insecure | not firm or firmly fixed; likely to fail or give way.; "the hinge is insecure" |
| ~ unfixed | not firmly placed or set or fastened. |
| adj. | 2. insecure, unsafe | lacking in security or safety.; "his fortune was increasingly insecure"; "an insecure future" |
| ~ unprotected | lacking protection or defense. |
| ~ dangerous, unsafe | involving or causing danger or risk; liable to hurt or harm.; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions" |
| ~ precarious, shaky | not secure; beset with difficulties.; "a shaky marriage" |
| ~ unguaranteed, unsecured | without financial security.; "an unsecured note" |
| ~ vulnerable | susceptible to attack.; "a vulnerable bridge" |
| adj. | 3. insecure | lacking self-confidence or assurance.; "an insecure person lacking mental stability" |
| ~ overanxious | anxious or nervous to an excessive degree. |
| ~ unassured | lacking boldness or confidence. |
| adj. | 4. insecure, unsafe | not safe from attack. |
| ~ vulnerable | susceptible to attack.; "a vulnerable bridge" |
| lethal | | |
| adj. | 1. deadly, lethal | of an instrument of certain death.; "deadly poisons"; "lethal weapon"; "a lethal injection" |
| ~ fatal | bringing death. |
| risky | | |
| adj. | 1. hazardous, risky, wild | involving risk or danger.; "skydiving is a hazardous sport"; "extremely risky going out in the tide and fog"; "a wild financial scheme" |
| ~ dangerous, unsafe | involving or causing danger or risk; liable to hurt or harm.; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions" |
| adj. | 2. bad, high-risk, risky, speculative | not financially safe or secure.; "a bad investment"; "high risk investments"; "anything that promises to pay too much can't help being risky"; "speculative business enterprises" |
| ~ unsound | not sound financially.; "unsound banking practices" |
| frightful | | |
| adj. | 1. atrocious, frightful, horrible, horrifying, ugly | provoking horror.; "an atrocious automobile accident"; "a frightful crime of decapitation"; "an alarming, even horrifying, picture"; "war is beyond all words horrible"; "an ugly wound" |
| ~ alarming | frightening because of an awareness of danger. |
| adj. | 2. awful, frightful, terrible, tremendous | extreme in degree or extent or amount or impact.; "in a frightful hurry"; "spent a frightful amount of money" |
| ~ colloquialism | a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech. |
| ~ extraordinary | beyond what is ordinary or usual; highly unusual or exceptional or remarkable.; "extraordinary authority"; "an extraordinary achievement"; "her extraordinary beauty"; "enjoyed extraordinary popularity"; "an extraordinary capacity for work"; "an extraordinary session of the legislature" |
| adj. | 3. fearful, frightful | extremely distressing.; "fearful slum conditions"; "a frightful mistake" |
| ~ bad | having undesirable or negative qualities.; "a bad report card"; "his sloppy appearance made a bad impression"; "a bad little boy"; "clothes in bad shape"; "a bad cut"; "bad luck"; "the news was very bad"; "the reviews were bad"; "the pay is bad"; "it was a bad light for reading"; "the movie was a bad choice" |
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