backward

back, backward, hind, behind

形容词 backward:

1. directed or facing toward the back or rear
2. (used of temperament or behavior) marked by a retiring nature
3. retarded in intellectual development
   同义词：feebleminded

副词 backward:

1. at or to or toward the back or rear
   同义词：back, backwards, rearward, rearwards
2. in a manner or order or direction the reverse of normal
   同义词：backwards
3. in or to or toward a past time
   同义词：back

1. This part of the country is still backward.
   这个国家的这个地区仍很落后。
2. Although he is clever, he is backward in giving his views.
   他虽然很聪明，却不善发表他的意见。
3. He looked backward over his shoulder.
   他回头向后看。

back.ward

adj.（形容词）
Directed or facing toward the back or rear.
向后的：指向或面向后边或后部的
Done or arranged in a manner or an order that is opposite to previous occurrence or normal use.
逆向的：以和先前的情况或正常的用法相反的方式或顺序来完成或安排的
Unwilling to act; reluctant; shy.
不愿做的；不情愿的；羞涩的
Behind others in progress or development:
落后的：在进程或发展上落后于其它人的：
例句：
The technology was backward, but the system worked.
虽然技术是落后的，但制度是有效的

adv.or （副词） 或
backwards
To or toward the back or rear.
向后地：向或朝向后边或后部地
With the back leading.
倒逆地：以后面的为领先地
In a reverse manner or order.
相反地：用相反的方式或次序
To, toward, or into the past.
回溯地：到、向或进入到过去
Toward a worse or less advanced condition.
退步地：向着不好或不太先进的状况

<习惯用语>bend over backward 或
lean over backward
To make an effort greater than is required.
竭尽全力：做比所需的更大的努力
【引伸】
back.wardly
adv.（副词）
back.wardness
n.（名词）
The adverb may be spelledbackward or backwards, and the forms are interchangeable:
这个副词可以被拼写为backward 或者 backwards， 两种词形是可以互换的：
例句：
stepped backward;
向后踏步；

例句：
a mirror facing backwards.
朝后面的镜子。

Onlybackward is an adjective:
只有backward 是形容词：
例句：
a backward view.
后面的风景