Unconvincing
/ˌʌnkəˈnvɪnsɪŋ/
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Definition
(adj) not convincing, plausible or believable
Sentence Examples
His explanation is unconvincing.
The argument is rigorous and coherent but ultimately unconvincing.
CEFR Practice Quiz
The lawyer's argument was ____, and the jury eventually decided that there was not enough evidence to find him guilty today.