unsafe
adjective /ʌnˈseɪf/
  /ʌnˈseɪf/
- (of a thing, a place or an activity) not safe; dangerous- The roof was declared unsafe.
- It was considered unsafe to release the prisoners.
- unsafe sex (= for example, sex without a condom)
 
- (of people) in danger of being harmed- He felt unsafe and alone.
 
- (British English, law) (of a decision in a court of law) based on evidence that may be false or is not good enough- Their convictions were declared unsafe.
 opposite safe