separate: may imply any of several causes such as dispersion, removal of one from others, or presence of an interfering thing: ~d her personal life from her career.


part: implies the separating of things or persons from close union or association: an argument that ~ed the friends permanently.


divide: implies a separating into pieces, groups, or sections by cutting, breaking, or branching: civil war ~d the nation.   （divide and conquer分而治之是词组，也是主要的算法设计范式algorithm design paradigm---如果能把复杂的大问题分解成简单的小问题，问题就解决了一半）  


sever: implies violence especially in the removal of a part or member: his arm had been ~ed by a chain saw.   链锯，小机器锯


sunder: suggests a violent rending or wrenching apart: a friendship ~ed only by death.     (rend用力撕,wrench拧)


divorce: implies a separating of two things that commonly interact or belong together: would ~ scientific research from moral responsibility.                 (belong属于;合得来如Talor Swift的表示合得来)


separate分开: 任何方式使不再连接(no longer connected)，如驱散移除干涉，part分开: 表示此前紧密地联系联合，divide分割: 表示分成碎片小组小块，如割砍折断叉开，sever割断: 表示暴力割断(removal移除)，常用于四肢或部件，sunder撕碎: 撕碎拧碎，同样表示暴力，divorce分开离异: 被分开的人或物通常在一起


记忆方法: 1) 首字母SPDSSD想成深深地撕破的<==分开

        2) 分开的意思是使不在一起mean to become or cause to become disunited or disjointed.首字母SPDSSD想成深深地撕破的<==分开