counterswear

English

Etymology

counter- +‎ swear

Verb

counterswear (third-person singular simple present counterswears, present participle counterswearing, simple past counterswore, past participle countersworn)

1. (transitive) To swear against; to take one's oath against.
   • 1926, Thomas Peter Ellis, Welsh Tribal Law and Custom in the Middle Ages, volume 2, page 374:

     If the defendant denied entirely or only partially, his own oath was conclusive on the point, unless the plaintiff counterswore.

   • 2011, Sharon Paice MacLeod, Celtic Myth and Religion, page 190:

     One of the Irish triads stated that the oath of a woman in childbirth was one of the three oaths that could not be countersworn.