expurgate
v.
1620s, "to purge" (in anatomy), back-formation from expurgation or from Latin expurgatus, past participle of expurgare "to cleanse out, purge, purify." Related: Expurgated; expurgating. The earlier verb was simply expurge (late 15c.), from Middle French expurger. Meaning "remove (something offensive or erroneous) from" is from 1670s.
〔李〕[ex-;purg;-atev.] v.删除（书籍等）中的不当之处 ←pur,purg (L purus,purgere)=(to) clean 净化