Adverb
In a caustic manner.
Source: Webster's dictionaryhe addressed her caustically Source: Internet
Gygax: "The main thrust for most players back then was the action, so a few PCs were unnamed, and we referred to them rather caustically as 'Joe's fighter' or 'Bob's cleric'. Source: Internet
Kevin Williamson put it most caustically in a March 2016 essay in National Review. Source: Internet
Taxi Driver caustically deconstructs the "dark" crime film, taking it to an absurd extreme and then offering a conclusion that manages to mock every possible anticipated ending—triumphant, tragic, artfully ambivalent—while being each, all at once. Source: Internet
When he threatened Meinhof that she would be put into a glass cage she answered caustically, "So you are threatening me with Eichmann's cage, fascist?" Source: Internet
Today, as I write this, supporters of Cruz, Trump, Rubio and Carson, are engaged in heated debates – some caustically overt – with their Conservative brethren. Source: Internet