razor       
 noun [ C ] uk/ˈreɪ.zər/ us/ˈreɪ.zɚ/
B2 (尤指刮胡子或腿毛的)剃刀,刮胡刀,剃须刀
a small device with a sharp blade for removing hair, especially from the face or legs
  Do you use an electric razor or the kind that you have to put a razor blade in? 你用的是电动剃须刀还是那种要安刀片的刮胡刀? 
 Idiom   
on a razor edgeidiom  处于险境;境况岌岌可危
in a very uncertain and dangerous situation
  Allegations of fraud have put the politician's career on a razor edge. 由于被指控有欺诈行为,这名政客的职业生涯岌岌可危。 
 razor       
verb [ T ] uk/ˈreɪ.zər/ us/ˈreɪ.zɚ/
 用剃刀剃;用刮胡刀刮
to cut something such as hair using a razor
  She razored the hair in long wispy layers. 她把头发修剪成了多层的长发。