Also means
to reason
Usage Note
Argumentar means to put forward a reasoned argument, not to quarrel — for arguing as a fight, use discutir or pelear. It is a regular -ar verb. The related noun is argumento and the agent noun is argumentador. Often used in academic or legal contexts: argumentar a favor de ('to argue in favour of').
Examples
"El abogado argumentó con claridad ante el juez."
Natural Translation
The lawyer argued clearly before the judge.

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