词根：trud, trus = to thrust, to push（推, 插入）
来源于拉丁语 trudere 推挤,过去分词为trusus。
同源词：
1. obtrude [使劲推以成为阻碍ob(=in the way，intensive)+trud(=thrust)]
vt.sth + upon / on + sb 强加，强制；伸出 vi. upon / on + sth 闯入，打扰
obtrusive adj. 强迫人的；鲁莽的
obtrusion n. 强加；闯入
obtrusively adv.冒失地
I'm sick of that guy obtruding his opinions upon us at every turn. 我对经常把自己的意见强加给我们的那个謇伙感到厌烦。
2. obtrude [向前推pro(=forth) +trud(=thrust)]
v.（使）伸出．（使）突出
protrusion n.伸出，突出
protrusive adj.伸出的，突出的；惹眼的
The lavatory protrudes 22 inches from the bathroom wall．洗脸池从冼手间的墙壁上突出来22英寸。
3. extrude [ex-出，trud 推;“推出”]
v.逐出，赶走，挤压出，喷出
extruder [见上，-er表示物] 挤压机
extrusion [见上，-ion名词后缀] 逐出，喷出，挤压
extrusive [见上，-ive…的] 逐出的，喷出的，挤出的
4. abstruse [用力刺的 abs<ab (= intensive, away) + trus (= thrust) ]
adj. deep in meaning；difficult to understand 深奥的；难以理解的；
abstruseness n. 深奥；难以理解；
For most people,the field of theoretical physics is decidedly abstruse . 对大部分人来说，理论物理学确实很难。
5. intrude [in-入，trud冲，闯;“闯入”，“冲入”]
v. 侵入，把…强加（在）；硬挤入，侵入；打扰
intruder [见上，-er者]
n.入侵者，闯入者 intruder aircraft（夜间空袭敌方机场的飞机）intruder patrols（强行闯入的巡逻队）
intrusion [in-入，trus冲，闯，-ion名词后缀]
n.入侵，闯入
guilty of unpardonable intrusior 不可饶恕的侵犯罪
angry at numerous intrusions 对屡次干扰感到愤怒
6. intrusive [见上，-ive…的]
adj.入侵的，闯入的
7. thrust
v.用力推；（用刀等）刺n．猛推，刺：突击；抨击；要点
thruster n. 推进者；（口>拼命向上爬的人
with one thrust（用力一推）
home thrust 打中要害的一击
8. protrude [pro-向前，trud推;“推向前”向前不断的推进，即使伸出 / 使突出]
v. 使伸出，使突出
9. protrudent [见上，-ent…的]
adj.伸出的，凸出的，突出的
10. protrusile [见上，-ile可…的]
adj.可伸出的，可突出的
11. protrusive [见上，-ive…的]
adj. 伸出的，突出的
12. detrude [de-下，trud推]
v.推下，推落，推倒，推去
detrusion n. [见上，-ion名词后缀] 推下，推倒
词根词缀：catheter-
【来源及含义】Greek > Latin: to let down, to insert, to thrust in [kata, "down" plus hienai, "to send"]
【同源单词】arterial catheter, balloon catheter, bladder catheter, cardiac catheter, catheter, catheterization
词根词缀：embolo-, embol-, emboli-
【来源及含义】Greek > Latin: that which is thrust into something; wedge, stopper; interpolation, obstruction; from "throw in" or "throw into"
【同源单词】emblem, emboli, emboliform, embolism, embololalia, embolomycotic
词根词缀：osmo-, osmia-, osmi-, osm-, -osmia, -osmatic (smell)
【来源及含义】Greek: odor; smell, smelling
【相关描述】Don't confuse this osmo- word-unit with another osmo- unit meaning "impulse, thrust".
【相关词根词缀】Inter-related cross references, directly or indirectly, involving word units meaning "smell, odor": arom-; brom-; odor-, odori-; olfacto-; osphresio-; ozon-.
【同源单词】allotriosmia, anosmatic, anosmia gustatoria, anosmia, anosmic, anosmic
词根词缀：osmo-, osmia-, osmi-, -osmia, -osmatic (push)
【来源及含义】Greek: impulse, thrust, push, impel
【相关描述】Don't confuse this osmo- word-unit with another osmo- unit meaning "smell, odor".
【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "push, shove, thrust": pel-; puls-; trud-.
【同源单词】biosmosis, chemosmosis, electroendosmosis, electro-osmosis, endosmosis, endosmotic
词根词缀：pel-, -pell, -pellent, -peal
【来源及含义】Latin: push, beat, strike, knock, drive
【相关描述】Don't confuse this pel- unit with another pel- group meaning "mud, earth, clay".
【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "push, shove, thrust": osmo-; puls-; trud-.
【同源单词】appeal, appealable, appealer, appealingly, appealingness, appellant
词根词缀：puls-, pulsi-, -pulsion, -pulsive
【来源及含义】Latin: push, beat, strike, knock, drive; drive to, force toward
【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "push, shove, thrust": osmo-; pel-; trud-.
【同源单词】appulse, appulsive, appulsively, compulsion, compulsive, compulsively
词根词缀：trud-, -trude, trus-, -trusion
【来源及含义】Latin: thrust, push, shove
【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "push, shove, thrust": osmo-; pel-; puls-.
【同源单词】abstrude, abstruse, abstrusely, abstruseness, abstrusity, autointrusion