impartial, just, fair, neutral, objective

名詞 neutral:

1. one who does not side with any party in a war or dispute

形容詞 neutral:

1. neither moral nor immoral; neither good nor evil, right nor wrong
2. having no personal preference
   同義詞：impersonal
3. having only a limited ability to react chemically; chemically inactive
   同義詞：inert, indifferent
4. not supporting or favoring either side in a war, dispute, or contest
5. having no net electric charge; not electrified
   同義詞：electroneutral
6. of something that is lacking hue
7. possessing no distinctive quality or characteristics
8. lacking distinguishing quality or characteristics

1. A neutral tie can be worn with a shirt of any colour.
   暗灰色的領帶配什麼顏色的襯衣都行。
2. He has a rather neutral character.
   他品性平平。
3. That country remained neutral in the war.
   那個國家在那場戰(zhàn)爭中保持中立。
4. When you start the engine, be sure the car is in neutral.
   你在發(fā)動引擎時，一定要讓汽車處于空檔。

neu.tral

adj.Abbr. neut.（形容詞）縮寫 neut.
Not aligned with, supporting, or favoring either side in a war, dispute, or contest.
中立的：不與…結盟的、不支持的或不援助戰(zhàn)爭、爭吵或競爭中的任一方的
Belonging to neither side in a controversy:
中間的：不屬于論戰(zhàn)中任何一方的：
例句：
on neutral ground.
站在中間立場上

Belonging to neither kind; not one thing or the other; indifferent.
非此亦非彼的：不屬于兩者中任何一種的；非此亦非彼的；沒有對錯的
Sexless; neuter.
無性的；中性的
Chemistry
【化學】
Of or relating to a solution or compound that is neither acidic nor alkaline.
酸堿平衡的：溶液或化合物非酸性也非堿性的或與之有關的
Of or relating to a compound that does not ionize in solution.
非電離的：化合物在溶液中不能電離的或與之有關的
Physics
【物理學】
Of or relating to a particle, an object, or a system that has neither positive nor negative electric charge.
中性的：粒子、物體或系統(tǒng)電位既非正也非負的或與之有關的
Of or relating to a particle, an object, or a system that has a net electric charge of zero.
電中性的：粒子、物體或系統(tǒng)電位為零的或與之有關的
Color Of or indicating a color, such as gray, black, or white, that lacks hue; achromatic.
【色彩】 中間色的：屬于或表明一種缺乏色度的顏色的，如灰、黑或白色的；無色彩的
Linguistics Pronounced with the tongue in a middle position, neither high nor low, as thea in around.
【語言學】 中性音的：發(fā)音時舌頭位于中間位置的，即不高也不低，如：around 中的 a 音
n.（名詞）

A nation nonaligned with either side in a war.
中立國：戰(zhàn)爭中不與任何一方結盟的國家
A citizen of such a nation.
中立國國民：不結盟國家中的居民
One who takes no side in a controversy:
中立者：不介入爭議中任何一方的人：
例句：
.I am by disposition one of life`s neutrals, a human Switzerland.(John Gregory Dunne)
.我是個天生的中立者，是一個瑞士人.(約翰·格列高利·鄧恩)

Color A neutral hue.
【色彩】 中性色彩
A position in which a set of gears is disengaged so that power cannot be transmitted.
空檔：一套齒輪在此處脫開，使動力不能傳送的位置

來源：
Middle English neuteral
中古英語 neuteral
from Old French neutral
源自 古法語 neutral
from Latin neutr3lis [grammatically neuter]
源自 拉丁語 neutr3lis [語法上中性的]
from neuter neutr- * see neuter
源自 neuter neutr- *參見 neuter

【引伸】
neu.trally
adv.（副詞）