"convincing" in the verb sense
1. convert, win over, convince
make (someone) agree, understand, or realize the truth or validity of something
"He had finally convinced several customers of the advantages of his product"
"convincing" in the adjective sense
1. convincing
causing one to believe the truth of something
"a convincing story"
"a convincing manner"
Source: WordNet® (An amazing lexical database of English)
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