The word "汪汪" is formed by reduplicating the character 汪, which is a phonetic-semantic compound composed of the water radical (氵) symbolizing its connection to liquid, and the phonetic component 王 (wáng) providing its sound. This reduplication results in a term that commonly denotes a state of being filled with water, like tears, or functions as an onomatopoeic representation of a dog's barking.