1、in- "in, on" + vers- + -e + -ly.
2、字面含义：turn inside out or turn outside in. => turn upside down.
3、该词来源于invert的拉丁语对应词的过去分词。由此取形容词词性并引申出如今的含义。
4、反正就是外面的转到里面去，对应的里面的自然就会被转到外面来了；这是转动一个东西的时候很自然的现象和规律。由此引申为：反转、颠倒、前后倒置。
5、由于该词取其形容词词性，其含义也引申出了一些新的含义：相反的；逆向的。

1. Pressure varies directly with temperature and inversely with volume.

压力随温度成正比例变化,与容积成反比例变化.

来自《简明英汉词典》

2. The size of the nebula at this stage is inversely proportional to its mass.

这个阶段星云的大小与其质量成反比。

来自柯林斯例句

3. The amount of force needed is inversely proportional to the rigidity of the material.

需要的力度与材料的硬度成反比.

来自《简明英汉词典》

4. The availability of good medical care tends to vary inversely with the need for it.

优质医疗服务的提供往往与需要成反比.

来自《简明英汉词典》

5. The value of a fraction is inversely proportional to that of the denominator.

分数值与分母值成反比例.

来自《现代汉英综合大词典》