Expressing or characterized by earnest protest or disagreement presented through reasoning and argument.
From expostulation + -ory (adjective suffix). This forms an adjective describing the nature or character of expostulation.
An expostulatory letter or speech is one where someone formally objects to something while maintaining a reasoned, logical tone—it's the diplomatic way to say 'I strongly disagree.'
Complete word intelligence in one call. Free tier — 50 lookups/day.