"wetting" in the noun sense
1. wetting
the act of making something wet
2. leak, wetting, making water, passing water
a euphemism for urination
"he had to take a leak"
"wetting" in the verb sense
1. wet
cause to become wet
"Wet your face"
2. wet
make one's bed or clothes wet by urinating
"This eight year old boy still wets his bed"
Source: WordNet® (An amazing lexical database of English)
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