词根：trench = to cut

  来自拉丁语的trench 意为to cut。同义词根有来自盎格鲁-撒克逊语的tail,来自拉丁语的cis,cop/coup,scind/scis,sect,sever,tons和来自希腊语的tom(tem)。

同源词：

1. retrench（向后截断re(=back) + trench(=cut)）
  v.减少（费用）,紧缩；节约
  retrenchment n.紧缩；节约经费
  The corporation was forced to retrench in light of falling revenues.由于收益减少，那家公司不得不缩减开支。

2. entrench（在内部截断en(=in) + trench(=cut)）
  vt.用壕沟围住，以壕沟防护；确立
  entrenchment n.战壕；挖壕沟
  Approval of commercial whaling is deeply entrenched in Japanese society.日本社会对商业性捕鲸活动的认可已经根深蒂固。

3. trenchant（截断的trench（=cut)）
  adj.（话语）锋利的；尖锐的；（政策）有力的；（轮廓）清晰的
  trench v.掘沟，挖战壕；(n.)战壕，沟渠；海沟
  trenchancy n.尖锐，锋利
  trenchantly adv.光锐地，锋利地
  We'll miss your trenchant comments at these meetings after you retire.您退任之后，我们会怀念在会议上所发表的那些一针见血的评论的。

4. trench
  n.沟；沟渠；战壕
  v.挖沟；侵占；挖战壕；侵害

5. trencher
  n.挖战壕的人；（尤其指旧时招待客人时用的）大木盘
  trencherman 食客；食量大的人
  trencher cap 大学的方项帽

词根词缀：-bust, -ust, -bur; bust-, bur-, ur-

【来源及含义】Latin: burere, "to burn up"; from urere, with an inserted or faulty separation of b in amburere, "to burn around"; which stands for amb-urere, "to burn around", but it was misdivided into am-burere and because of this misdivision, the new verb burere was formed with the past participle bustum; so, it really came from urere, "to burn, to singe"

【相关词根词缀】 Cross references of word groups that are related, directly, indirectly, or partly to: "fire, burn, glow, or ashes": ars-, ard-; cand-, cend-; caust-, caut-; crema-; ciner-; ether-; flagr-; flam-; focus, foci-; fulg-; gehenna-; ign-; phleg-; phlog-; pyreto-, -pyrexia; pyr-; spod- (ashes; waste); volcan-.

【同源单词】adust, adustion, adustness, biomass combustion, combure, comburence