/ru:t; rut/
n
1 [C] part of a plant that keeps it firmly in the soil and absorbs water and food from the soil （植物的）根（部）
*a plant with very long roots 根部很长的植物
* pull a plant up by the roots 把一植物连根拔起.
2 roots [pl] family ties, feelings, etc that attach a person emotionally and culturally to the society or community where he grew up and/or lives or where his ancestors lived （家族的）根
*Many Americans have roots in Europe. 许多美国人祖籍在欧洲.
* She has no real roots in this area. 她原籍不在这儿.
3 [C] part of a hair, tooth, nail or tongue that attaches it to the rest of the body （毛发、牙齿、指甲或舌头的）根部
*pull hair out by (ie complete with) the roots 把头发连根拔掉.
4 [C esp sing 尤作单数] (fig 比喻) source or basis 根源; 根基; 根本; 基础
*The root of the problem is lack of trust. 产生这问题的根源在于缺乏信任.
* Money is often said to be the root of all evil. 金钱常常说成是万恶之源.
5 [C] (also base form) (grammar) form of a word on which its other forms are said to be based 词根
*`Walk' is the root of `walks', `walked', `walking' and `walker'. walk是 walks、walked、walking、walker 的词根.
6 [C] (mathematics 数) quantity which, when multiplied by itself a certain number of times, produces another quantity 方根; 根:
4 is the square root of
16 (4 x
4 = 16), the cube root of
64 (4 x
4 x
4 = 64) and the fourth root of
256 (4 x
4 x
4 x
4 = 256). 4是16的平方根、是64的立方根、是256的四次方根. =>App
4 见附录4.
7 (idm习语) get at/get to/strike at the `root(s) of sth discover the source of sth (usu problematic or unpleasant) and tackle it there 找到某事物（通常指棘手的或讨厌的事物）的根源并加以解决. pull up one's roots => pull2. put down (new) `roots establish oneself in a place to which one has moved 在新的地方立足. ,root and `branch thorough(ly); complete(ly) 彻底（的）; 完全（的）
*destroy an organization root and branch 彻底摧毁一个组织
* [attrib 作定语] root-and-branch reforms 全面的改革. the root cause (of sth) the fundamental cause 根本原因
*He argues that one of the root causes of crime is poverty. 他认为犯罪的一个根本原因是贫穷. take/strike root
(a) (of a plant) send down a root or roots （指植物）生根, 扎根.
(b) (fig 比喻) become established 建立; 确立
*a country where democracy has never really taken root 从未真正建立起民主制度的国家.

/ru:t; rut/
v
1 (a) [I, Ipr] (of a plant) send down roots and begin to grow （指植物）生根成长
*This type of plant roots easily. 这种植物容易生根成长.
(b) [Tn, Tn.pr] plant (sth) 种植（某物）
*Root the cuttings in peat. 把插枝扦插泥炭中.
2 [Tn.pr esp passive 尤用于被动语态] cause (sb) to stand fixed and unmoving 使（某人）站立不动
*be/stand rooted to the spot/ground 站在那里不动
* Fear rooted him to the spot. 他吓得呆若木鸡.3 [usu passive 通常用于被动语态
*Tn, Tn.pr] establish (sth) deeply and firmly 使（某事物）深深扎根; 牢固地树立（某事物）
*a story firmly rooted in reality 深深扎根于现实中的小说
* Her affection for him is deeply rooted. 她对他矢志不渝.
* He has a rooted objection to cold baths. 他一向反对冷水浴.
4 (phr v) root sth out destroy sthcompletely 根除某事物
*determined to root out corruption决心根除腐败现象. root sth up dig or pull up (a plant, etc) with the roots 将（植物等）连根挖出或拔起.

/ru:t; rut/
v (phr v) root about/around (for sth)
(a) (of pigs) turn up the ground with the snout in search of food （指猪）用鼻拱土觅食
*rooting for acorns 用鼻拱土寻觅橡实.
(b) (of people) turn things over when searching, esp in an untidy way （指人）翻寻, （尤指）乱翻
*What are you doing rooting around in my desk? 你在我的书桌里乱翻什么呀? root for sb/sth (no passive 不用于被动语态) (infml 口) cheer for sb/sth; support sb/sth wholeheartedly 给某人[某事物]打气; 全力支持某人[某事物]
*We're rooting for the college baseball team. 我们在给学院的棒球队加油.
* We're all rooting for you good luck with your job interview! 我们全都支持你--祝你求职面试成功! root sth out (infml 口) find sth after hard searching 终于找到某物
*I managed to root out a copy of the document. 我好不容易才找到了文件的副本.