From The Collaborative International Dictionary of English v.0.44 [gcide]:
Dangerous \Dan"ger*ous\, adjective [OE., haughty, difficult, dangerous, fr. OF. dangereus, F. dangereux. See {Danger}.]
1. Attended or beset with danger; full of risk; perilous; hazardous; unsafe.
Our troops set forth to-morrow; stay with us; The ways are dangerous. --Shak.
It is dangerous to assert a negative. --Macaulay.
2. Causing danger; ready to do harm or injury.
If they incline to think you dangerous To less than gods. --Milton.
3. In a condition of danger, as from illness; threatened with death. [Colloq.] --Forby. Bartlett.
4. Hard to suit; difficult to please. [Obs.]
My wages ben full strait, and eke full small; My lord to me is hard and dangerous. --Chaucer.
5. Reserved; not affable. [Obs.] ''Of his speech dangerous.'' --Chaucer. -- {Dan"ger*ous*ly}, adverb -- {Dan"ger*ous*ness}, noun
From WordNet (r) 2.0 [wn]:
adjective
1: involving or causing danger or risk; liable to hurt or harm; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions" [syn: {unsafe}] [ant: {safe}]
2: 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" [syn: {grave}, {grievous}, {serious}, {severe}, {life-threatening}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
57 Moby Thesaurus words for "dangerous": alarming, bad, chance, chancy, critical, dangersome, desultory, explosive, fell, fraught with danger, grievous, hairy, haphazard, harmful, hazardous, hit-or-miss, iffy, infirm, insecure, insubstantial, jeopardous, major, menacing, parlous, periculous, perilous, precarious, provisional, random, rickety, risky, serious, shaky, shifting, shifty, slippery, temporary, tentative, threatening, ticklish, treacherous, ugly, uncertain, undependable, unfaithworthy, unhealthy, unreliable, unsafe, unsolid, unsound, unstable, unsteadfast, unsteady, unsubstantial, unsure, untrustworthy, wicked
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