TO HOLD WATER

If something (such as an argument or theory) holds water, it appears to be reasonable or convincing.  This phrase is often used in its negative form.

 Examples

 “Yes, I understand proportionality and fairness, but I don’t think your argument holds water.”

 “Claims that uranium mining near the Grand Canyon is safe don’t hold water”

 “However, for many historians, this theory doesn’t hold water.”


 We also say that an argument that is unconvincing is full of holes (like a sieve); this may explain the origin of the phrase “doesn’t hold water.”

 e.g. “Needless to say, the theory is full of holes.”


 The phrase “hold water”can be used in a literal as well as an idiomatic sense.

 e.g. “Also, sphagnum moss is planted, which holds water and forms peat.”


 Photo credit: Tim Hoggarth (Creative Commons)