sever sth
及物动词，直接跟宾语，常指切断联系或关系。
The company severed all business ties with its partner.
该公司断绝了与合作伙伴的所有业务关系。
切断；割断
断开；终止；断绝；分开；分离；区分；区别；发生分离；被分开或隔开。
to cut something off or through
切断；割断。
To cut free.
发生分离；被分开或隔开。
To suffer disjunction; to be parted or separated.
作出区分或区别；分辨。
To make a separation or distinction; to distinguish.
断开；使分离；终止。
To disconnect; to disunite; to terminate.
一般现在时
The river severs the town in two.
这条河将小镇一分为二。
一般过去时
He severed ties with his former partner.
他与前合伙人断绝了关系。
现在完成时
They have severed all diplomatic relations.
他们已经断绝了一切外交关系。
常规动词
The storm caused a tree branch to sever the power line.
风暴导致树枝切断了电线。
用法提示：sever 用作及物动词，表示物理切断。
They are severing all diplomatic ties with the neighboring country.
他们正在断绝与邻国的所有外交关系。
用法提示：severing 是现在分词，表示断绝关系。
The company severs its partnership with the supplier due to quality issues.
这家公司因质量问题切断了与供应商的合作关系。
用法提示：severs 是第三人称单数，表示终止合作关系。
及物动词，直接跟宾语，常指切断联系或关系。
The company severed all business ties with its partner.
该公司断绝了与合作伙伴的所有业务关系。
指将某物从整体中分离出来。
He severed the limb from the tree with a saw.
他用锯子将树枝从树上锯断。
常用于国家、组织、个人之间关系的断绝。
The two countries severed diplomatic relations after the conflict.
冲突后两国断绝了外交关系。
常用被动语态，表示被切断的状态。
The cable was severed during the storm.
风暴中电缆被切断。
更物理性，sever 更强调彻底分离
sever 语气更强，常指强行或彻底分开
常用于关系或物体的一部分，sever 更正式
sever 有物理切割意味，disconnect 多用于抽象或电子连接
sever 暗示切割或断裂，detach 可指简单分离
grammar · medium
易错句子He decided to severe all connections with the past.
正确表达He decided to sever all connections with the past.
Severe 是形容词，意为“严重的”，而 sever 是动词，意为“切断”。此处需要动词形式，故应使用 sever。
grammar · medium
易错句子The doctor severed the tumor with the healthy tissue.
正确表达The doctor severed the tumor from the healthy tissue.
Sever 后接 from 表示“将…与…分离”，而 with 表示使用的工具或伴随。此处表示分离，应用 from。
意思不同：sever指切断或断绝，severe是形容词表示程度严重，二者发音相似但词性及含义完全不同。
侧重不同：separate强调将整体分成部分或使事物彼此不连接，而sever更强调用力切断或彻底断绝关系，语气更强。
用法不同：cut是通用词，可指用刀具等切割任何物体；sever通常指切断连接部分或彻底分离，更正式且常引申为断绝关系。
断绝关系
The company decided to sever ties with its business partner.
该公司决定断绝与商业伙伴的关系。
断绝关系
They severed all diplomatic relations after the conflict.
冲突后他们断绝了一切外交关系。
截肢
The doctor had to sever the patient's leg to stop the infection.
医生不得不截去病人的腿以阻止感染。
切断连接
The storm severed the connection between the island and the mainland.
暴风雨切断了该岛与大陆之间的连接。
切断联系
The investigation revealed that he had severed all links with his former associates.
调查显示他已切断与前同事的一切联系。
解除合同
Either party may sever the contract if the terms are not met.
如果条款未得到满足，任何一方均可解除合同。
断绝关系
The company decided to sever ties with its business partner after the scandal.
丑闻发生后，公司决定与商业伙伴断绝关系。
断绝关系
The two countries severed relations after the border conflict.
边境冲突后，两国断绝了关系。
切断一切联系
After the divorce, she severed all connections with her ex-husband.
离婚后，她与前夫切断了所有联系。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.