return: may imply a going back to a starting place or source or to a former or proper place or condition: ~ed home to an enthusiastic welcome.


revert: is likely to imply a going back to a former, often a lower, condition: ~ed to an earlier, less civilized state; but it can also apply to a returning after interruption: after careful consideration he ~ed to his first decision.


recur: implies a return, often repeated returns, of something that has happened or been experienced before: suffered from ~ring headaches. 不断的头痛


recrudesce: implies a returning to life or activity especially of something that has been suppressed or kept under control: after an initial subsidence, the epidemic ~d with renewed vigor.  这个词的末尾desce发音像日语


return返回: 指回到起点或先前状态，revert回退返回: 指回到先前较差的状态，或表示中断后返回，recur反复: 表示返回，多指反复返回，recrudesce恢复: 指恢复生气活力，之前被压制控制

记忆方法: 1）首字母4R<==返回

         2）返回的意思是回来或回去mean to go or come back.