An accomplice is someone who helps another person commit a crime or do something wrong. If a student creates a distraction so their friend can sneak extra cookies from the cafeteria, that student is acting as an accomplice to the theft. If someone drives the getaway car after a bank robbery, they're an accomplice to the robbery, even though they never went inside the bank.

The word carries serious weight because accomplices share responsibility for the wrongdoing. In law, an accomplice can face punishment almost as severe as the main criminal. That's because helping someone break rules or laws makes you part of the problem, not an innocent bystander.

What distinguishes an accomplice from a casual helper is knowledge and intent. If you unknowingly help someone do something wrong (like lending your bike to someone who uses it to escape after shoplifting), you're not an accomplice because you didn't know about the plan. But if you knowingly help, cover up the crime, or plan it together, you become an accomplice.