agumentar is incorrectly written, and should be written as "argue" being its meaning: Word of Latin origin, from argumentum argumenti: argument, reasoning ( of arguis aliquem argui argutum arguo: prove, demonstrate, make clear, evidence and the suffix-mentum, which means " action and effect of " ). Argue is because providing evidence in support of a thesis or position mental reasoning or build reasoning to reach a conclusion, bring out something.