nervous nerv-, 神经；胆量，勇气
Of or relating to the nerves or nervous system: nervous tissue. Stemming from or affecting the nerves or nervous system: a nervous disorder.
Easily agitated or distressed; high-strung or jumpy.
Marked by or having a feeling of unease or apprehension: nervous moments before takeoff.
adj. 神经的；紧张不安的；神经兴奋的

例句：
The brain is a part of the nervous system of the human body.
脑是人体神经系统的一部分。
She felt very nervous with so many people looking at her.
这么多人瞧着她, 她感到非常紧张。

nerve
a group of long thin fibres that carry information or instructions between the brain and other parts of the body:
bravery or confidence necessary to do something difficult, unpleasant or rude:
the rudeness to do something that you know will upset other people
A sore point or sensitive subject
A vein or rib in the wing of an insect.
The midrib and larger veins in a leaf.
To give strength or courage to.
n. 神经；勇气；神经过敏;忧虑,焦躁；[植] 叶脉;【昆虫学】翅脉
vt. 鼓起勇气

例句：
I am always in a state of nerves on the eve of an examination.
临考的前夕我总是非常紧张。
She nerved herself to enter the dark room.
她鼓足勇气走进黑洞洞的房间。

unnerve
To deprive of fortitude, strength, or firmness of purpose.
To make nervous or upset.
vt. 使失去勇气；使身心交疲；使焦躁；使失常

例句：
The sight of so much blood unnerved her.
一见那么多血，把她吓坏了。

nerveless
Lacking strength or energy; spiritless; weak.
Lacking courage; spineless or cowardly.
Calm and controlled in trying circumstances; cool.
adj. [临床] 无力的；松懈的；(紧急情况下)冷静的，沉着的

nervy
Arrogantly impudent; brazen.
Showing or requiring courage and fortitude; bold.
Chiefly British. Jumpy; nervous.
adj.【口】傲慢的；厚脸皮的；有勇气的；易激动的；紧张不安的

enervate
To weaken or destroy the strength or vitality of
Medicine. To remove a nerve or part of a nerve.
Deprived of strength; debilitated.
vt. 使衰弱；使失去活力
adj. 衰弱的；无力的

例句：
She was enervated from (或 with) dissipation.
她由于生活放荡不羁而气虚体亏。
She was enervated by the luxury of palace life.
宫廷的奢华生活使她变得萎靡不振。

enervation
lack of vitality
serious weakening and loss of energy
n. 衰弱；虚弱；削弱；神经无力

innerve
To give nervous energy to; stimulate
vt.鼓舞；使活跃，使有生气;使受神经支配 (= innervate)

innervation
the act of innervating; state of being innervated.
n.【解】支配; 神经兴奋作用[过程]