countersue

English

Etymology

From counter- +‎ sue.

Verb

countersue (third-person singular simple present countersues, present participle countersuing, simple past and past participle countersued)

1. (transitive, intransitive) To sue a person or entity who is suing one.
   • 2014, Eric L. Haralson, Encyclopedia of American Poetry: The Nineteenth Century, page 497:

     Forrest later attacked Willis in New York, knocking him to the ground; lawsuits proliferated as Willis sued Forrest for assault, and Forrest countersued for libel.