accomplice
US /əˈkɑːm.plɪs/
UK /əˈkɑːm.plɪs/

1.
同谋, 帮凶
a person who helps another commit a crime or do something wrong
:
•
The police arrested the thief and his accomplice.
警方逮捕了小偷和他的同谋。
•
She was charged as an accomplice in the fraud case.
她被指控为诈骗案的同谋。