hazard
/ˈhæzəd; `hæzɚd/ n
1 ~ (to sb/sth) (thing that can cause) danger; risk 危险; 有危险的事物; 风险
Smoking is a serious health hazard. 吸烟严重危及健康.
Wet roads are a hazard to drivers. 道路湿滑会对司机构成危险.
2 obstacle on a golf-course （高尔夫球场上的）障碍物. hazard, v [Tn]
1 expose (sth) to danger; risk 使（某事物）遭受危险; 使...冒风险
Rock-climbers are hazarding their lives. 岩石上的攀登者在冒生命的危险.
2 venture to make (sth); suggest tentatively 冒险做出（某事物）; 试探性地提出
I don't know where he is but I could hazard a guess. 我不知道他在那里, 但我可以猜猜看.