Water also is insubstantial; by that I mean you cannot grasp hold of it, you cannot punch it and hurt it.

水也是没有实体的，这样说是指你无法抓住水，你无法击打它、伤害它。

youdao

We are getting reports and calls that are breaking my heart from people saying, 'I have been in my attic, I cannot take it any more, the water is up to my neck, I don't think I can hold out'.

我们接到报告和电话说：‘我在我家的阁楼上，我受不了了，水已经到我的脖子了，我坚持不住了。’我真是感到心痛。

youdao

If it does not hold water, then it is weak and cannot be proved.

VOA: special.2009.05.10

How credible is the IPCC?. The old 2000 scientists cannot be wrong argument also does not hold water(it is actually 2500).

BBC: Is Cameron still keen to be green?