killer

名词 killer:

1. someone who causes the death of a person or animal
   同义词：slayer
2. the causal agent resulting in death
   同义词：cause of death
3. a difficulty that is hard to deal with
4. predatory black-and-white toothed whale with large dorsal fin; common in cold seas
   同义词：killer whale, orca, grampus, sea wolf, Orcinus orca

1. The killer stabbed him with a knife/stabbed a knife into him.
   凶手用刀刺他。
2. Police are baffled as to the identity of the killer.
   警方不解凶手是谁。
3. The net result of the long police investigation is that the identity of the killer is still a complete mystery.
   警方经长时间调查，结果凶手的身分仍全然不知。
4. The police chief spoke of his determination to catch the killer.
   警长谈到他决意要抓获凶手。
5. Hitler is a notorious killer.
   希特勒是一个臭名昭著的刽子手。

kill.er

n.（名词）
One that kills:
杀人者：
例句：
a disease that was a killer of thousands; a killer of new ideas.
杀死了千万人的疾病；杀死新思想的杀手

Slang Something that is extremely difficult to deal with or withstand:
【俚语】 鬼门关：极难对付或抗拒的东西：
例句：
an exam that was a real killer.
真正是鬼门关的考试