/ˈdedli ||; ˈdɛdlɪ/adj adv(
deadlier;deadliest)
1 causing or likely to cause death 致命的；可能致死的: a deadly poison/weapon/disease 致命的毒药╱武器╱疾病
2 very great; complete 极度的；完全的: They're deadly enemies. 他们是死敌。
3 completely; extremely 完全；极其: I'm not joking. In fact I'm deadly serious. 我不是在开玩笑。事实上，我是非常认真的。
4 extremely accurate, so that no defence is possible 极其准确的；不可防守的: That player is deadly when he gets in front of the goal. 那名球员的临门一脚是必进的。