Simple past tense and past participle of wet.(verb)
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Use "wetted" in a sentence
"On a glass plate placed on a leveled stand, is laid a sheet of paper previously wetted, which is then flattened into contact with an India rubber squeegee, taking care to remove the air bubbles interposed."
"I wetted my lips, trying not to notice the way my mouth suddenly went dry."
"Thanks to you both for an interview that just “wetted” my appetite for the new book (s)."