DANGEROUS

dangerous, grave, grievous, serious, severe, life-threatening

(adjective) 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”

dangerous, unsafe

(adjective) involving or causing danger or risk; liable to hurt or harm; “a dangerous criminal”; “a dangerous bridge”; “unemployment reached dangerous proportions”

Source: WordNet® 3.1

Etymology

Adjective

dangerous (comparative more dangerous, superlative most dangerous)

Full of danger.

Causing danger; ready to do harm or injury.

(colloquial, dated) In a condition of danger, as from illness; threatened with death.

(obsolete) Hard to suit; difficult to please.

(obsolete) Reserved; not affable.

Usage notes

The standard comparative and superlative are more dangerous and most dangerous; the forms dangerouser and dangerousest or dangerest exist but are nonstandard.

Synonyms

(full of danger)

• hazardous

• perilous

• risky

• unsafe

• See also dangerous

Antonyms

• (full of danger): safe, harmless

Anagrams

• nose guard, noseguard

Source: Wiktionary

Dan"ger*ous, a. Etym: [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, adv.

– Dan"ger*ous*ness, n.

Source: Webster’s Unabridged Dictionary 1913 Edition