lethal

1. ADJ A substance that is lethal can kill people or animals. 致命的

...a lethal dose of sleeping pills. …安眠葯的致命劑量。

2. ADJ If you describe something as lethal, you mean that it is capable of causing a lot of damage. 危害極大的

Amorality and intelligence is probably the most lethal combination to be found within one personality. 缺乏道德卻聰明智慧可能是同一人格中危害最大的組郃。