hubieran impugnado
-they/you had challenged
Past perfect subjunctive ellos/ellas/ustedes conjugation of impugnar.

impugnar

TRANSITIVE VERB
(legal)-to challenge
Synonyms for impugnar
Antonyms for impugnar
TRANSITIVE VERB
(to contradict)-to refute
Synonyms for impugnar
Word of the Day
chestnut