Meanings of most vituperative in English

Since his inauguration, Stanton had been one of his most vituperative critics.

As so often with the most vituperative pamphleteers, Frum is in person genial and conciliatory.

Curiously, although no derogatory mention had previously been made of him, the articles and editorials were now most vituperative.

There was a strong, though mixed, reaction yesterday to the news of Ian Paisley's death from the arts community.Even at his most vituperative there w(...)