1. (

• dangerous ,
• unsafe

) involving or causing danger or risk; liable to hurt or harm; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions" ;

2. (

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

) 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" ;