aid and abet

/EY1 D AH0 N D AH0 B EH0 T/
verb
  1. 1

    (transitive) To assist (someone) in an illegal act as an accessory or accomplice.

  2. 2

    (transitive) To assist someone in (an illegal act) as an accessory or accomplice.

  3. 3

    (intransitive) To be an accessory or accomplice to someone in an illegal act.