dangerous,
unsafe 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"
risky -
not financially safe or secure; "a bad investment"; "high risk investments"; "anything that promises to pay too much can't help being risky"; "speculative business enterprises"
