radical

radical汉语翻译：
n. 激进分子, 词根, 基础, 根式, 根
a. 激进的, 根本的, 基本的, 根的
【化】 根; 原子团; 基
【医】 根, 基, 原子团词型变化：
名词:radicalness副词:radically词意辨析：
basic, essential, fundamental, radical, vital这些形容词均有“基本的，基础的”之意。
basic: 普通用词，指明确、具体的基础或起点。
essential: 语气比basic和fundamental强，强调必不可少，暗含某物如缺少某部分，则失去本质特征的意味。
fundamental: 书面用词，不如basic使用广泛，侧重指作为基础、根本的抽象的事物。
radical: 着重指事物的根本或其来源。
vital: 正式用词，侧重指维持生命、活力必不可少的，或生死攸关的。英语解释：
名词 radical:

(chemistry) two or more atoms bound together as a single unit and forming part of a molecule同义词：group, chemical group

an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule than has lost an electron and will stabilize itself by stealing an electron from a nearby molecule同义词：free radical

a person who has radical ideas or opinions

a character conveying the lexical meaning of a logogram

a sign placed in front of an expression to denote that a root is to be extracted同义词：radical sign

(linguistics) the form of a word after all affixes are removed同义词：root, root word, base, stem, theme

形容词 radical:

(used of opinions and actions) far beyond the norm同义词：extremist, ultra

markedly new or introducing radical change同义词：revolutionary

arising from or going to the root

of or relating to or constituting a linguistic root

especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem同义词：basal

例句：

I don't belong to the school of thought that favours radical change.我不属於激进派。

Radical political views.激进的政治观点

Ted is a fire-eating radical.泰德是个咄咄逼人的急进份子。

They called for a radical reform of our tax system.他们要求对税收制度进行根本改革。

The talks are aimed at radical reductions in the level of weapons.那些会谈都以大幅度裁减军备为目标。

详细解释：
rad.i.cal
adj.（形容词）
Arising from or going to a root or source; basic:
根本的，根源的：产生于或到达根部或源泉的；基础的：
例句：
a radical flaw in a plan; chose the radical solution of starting all over again.
计划的根本性缺陷；选择重新开始的根本解决方法
Departing markedly from the usual or customary; extreme:
极端的，彻底的：明显背离常规或习惯的；极端的：
例句：
radical opinions on education.
对教育的极端的见解
Favoring or effecting fundamental or revolutionary changes in current practices, conditions, or institutions:
激进的，改革的：支持或引起目前的惯例、条件或制度根本性或革命性的变化的：
例句：
radical political views.
激进的政治观点
Linguistics Of or being a root:
【语言学】 词根的：属于或作为词根的：
例句：
a radical form.
词根形式
Botany Arising from the root or its crown:
【植物学】 根生的，根的：生于根部或冠部的：
例句：
radical leaves.
根生的叶
n.（名词）
One who advocates fundamental or revolutionary changes in current practices, conditions, or institutions:
激进分子：在目前的习惯、条件或制度下鼓动根本性或革命性改变的人：
例句：
radicals seeking to overthrow the social order.
企图扰乱社会次序的激进分子
Abbr. rad.Mathematics The root of a quantity as indicated by the radical sign.
缩写 rad.【数学】 根，根号：用根号表示出来的一个数的根
Symbol R An atom or a group of atoms with at least one unpaired electron.
符号 R 原子因，基团：至少有一个游离电子的原子或一组原子
Abbr. rad.Linguistics See root
缩写 rad.【语言学】 参见 root
来源：
Middle English [of a root]
中古英语 [根]
from Late Latin r3doc3lis [having roots]
源自 后期拉丁语 r3doc3lis [有根的]
from Latin r3dox r3doc- [root] * see wr3d-
源自 拉丁语 r3dox r3doc- [根] *参见 wr3d-
【引伸】
rad.ically
adv.（副词）
rad.icalness
n.（名词）