godan verb (-ru), transitive verb
argue down; confute; talk down
To defeat someone in an argument by reasoning or eloquence; implies a verbal victory where the opponent is silenced or proven wrong.
彼は相手を言い破って議論に勝った。
He argued his opponent down and won the debate.
どんな反論も彼女に言い破られてしまった。
Every counterargument was confuted by her.