避开：避免被（某物）击中。
防止：采取措施来防止（某事）发生。
ward off // [ warding warded ]
动词词组 To ward off a danger or illness means to prevent it from affecting you or harming you. 阻挡 (危险、疾病等)
She may have put up a fight to try to ward off her assailant.
她可能进行过一场搏斗，试图击退袭击者。
... ward n.1.病房2.(城市的)区 ward off防止，避开 warden n.1.(监督某些法规执行的)监察员，检察官2.典狱长，监狱长 ...
... ward off防止;防治;避免;挡住 maternity ward产科病房 observation ward观察室 ...
... [prop up] 支持局面使不崩溃 [keep out;ward off] 抵挡;招架 [prop up;support] 支撑;撑住 ...
He brought his arm up in a futile attempt to ward off the blow.
他出于挡住这一击的无谓企图抬起了他的胳膊。
Many people swear by vitamin C's ability to ward off colds.
很多人深信维生素C能预防感冒。
She may have put up a fight to try to ward off her assailant.
她可能进行过一场搏斗，试图击退袭击者。
The sad thing is that the majority of people that are killed by malaria are children because there immune system is not strong enough to ward off this infection."
VOA : special.2009.12.22
The superfluous action suggests that there was something more at stake, perhaps, than Saint Ebba's attempt to ward off sexual assault.
过多的行动表明，有比,圣人Ebba试图保护自己不受侵犯更有风险的东西。
弥尔顿课程节选 : 耶鲁公开课
You blame yourself as a victim of trauma for not having the sufficient vigilance in your outer cortex to ward it off.
你会因为你的脑皮层,不能有效保护你不受创伤危害,而成为创伤受害者。
文学理论导论课程节选 : 耶鲁公开课
Beer could be laced with opium to ward off the malaria that flourished in the Fens.
The idea is to ward off rapidly growing competitors Liberty Tax Service and Jackson Hewitt.
Fulton said regular workouts help ward off disease and keep weight stable over time.
CNN: Weight losers combat fear of exercise, schoolyard torment