DictionarydangerousLikely to cause harm
adjective

dangerous

DAYN-jer-uhs/ˈdeɪndʒərəs/

Able or likely to cause harm or injury.

The crumbling cliff edge makes the path ahead too dangerous to cross.

A woman stops just before a crumbling cliff-path edge: the ground directly ahead has broken away, leaving a deep drop and loose stones falling below.
Etymology

Danger once meant authority or power to harm: being under another's control could expose someone to injury. Dangerous shifted from describing someone overbearing or difficult to describing something hazardous or liable to cause harm.

In context

Nat Geo Animals25:56
But the Mozambique spitting cobra is much more dangerous. They're responsible for thousands of the most serious bites and venom-related injuries recorded in their range.
Africa's Most Dangerous Snakes (Full Episode) | World's Deadliest Snakes | Nat Geo Animals

More examples

  • It is dangerous to swim in this current.
  • The damaged wire created a dangerous situation.
  • They removed the most dangerous branches first.

Forms

dangerous

danger noun — Risk of harm or injury

dangerously adverb — In a way that risks harm

Similar words

hazardous
Often describes risky conditions, materials, or activities more formally.
perilous
Often implies a higher or more immediate degree of danger.