/ˈkaʊntə-suːt/ – verb
Definition: kiện lại, phản kiện, phản tố.
A more thorough explanation: A counter-suit is a legal action brought by a defendant in response to a lawsuit filed against them by the plaintiff. It typically asserts claims against the plaintiff related to the same subject matter as the original lawsuit.
Example: The defendant filed a counter-suit against the plaintiff, claiming that the allegations made in the original lawsuit were false.