sever          
verb [ T ] uk/ˈsev.ər/ us/ˈsev.ɚ/
 弄断;分开;(尤指)切断,割断
to break or separate, especially by cutting
  The knife severed an artery and he bled to death. 刀子割断了动脉,他流血过多而死。 
 Her foot was severed from her leg in a car accident. 在一次车祸中,她的脚与腿断开了。 
 Electricity cables have been severed by the storm. 风暴弄断了电缆。 
  中断,断绝(联系)
to end a connection with someone or something
  The US severed diplomatic relations with Cuba in 1961. 美国于1961年断绝了与古巴的外交关系。 
 The company has severed its connection/links/relationship/ties with its previous partners. 公司断绝了与前合作伙伴之间的联系/关系。