impugns is impugn's Simple Present

impugn

US [ɪmˈpjun]
UK [ɪmˈpjuːn]
  • v.责难;指摘(声明,行为,性质等)
  • Web打击;攻击;抨击
Simple Present:impugns  Present Participle:impugning  Past Tense:impugned  
v.
1.
责难,攻击;指摘(声明,行为,性质等)