have been nullifying

• present perfect progressive

  present perfect progressive

  Used to describe an action that began in the past, has continued continuously, and is still in progress.

  of nullify.
  nullify

  verb (used with object)

  to render or declare legally void or inoperative.

Related Words

• abolish
• abrogate
• annul
• invalidate
• negate
• offset
• quash
• repeal
• rescind
• restrict
• torpedo
• undo
• veto
• void
• wipe out