What is the origin of the idiom "weak as water" and when to use it?

The origin of the idiom "weak as water" can be traced back to ancient times. Water, being a fundamental element, has long been associated with qualities such as fluidity, lack of resistance, and weakness. The idiom likely originated from the observation that water is easily influenced or overpowered, lacking the strength or solidity of other substances. Over time, this concept was figuratively applied to describe things or individuals that exhibit similar characteristics of weakness or lack of resilience. The idiom has been in use for centuries and has become a common expression in the English language.