misdefend

English

Etymology

From mis- +‎ defend.

Verb

misdefend (third-person singular simple present misdefends, present participle misdefending, simple past and past participle misdefended)

(transitive, chiefly bridge) To defend incorrectly.
- 2009 September 26, Phillip Alder, “Jack Gets Bragging Rights in Computer Battle”, in New York Times‎^[1]:
  After a flat board, Wbridge5 misdefended to allow a second overtrick in three no-trump.