ABET

ABET      /əˈbɛt/

Encourage or assist (someone) to do something wrong

Memory key

Imagine two boys were talking

A boy was saying that he was going to hack his college website. then another boy said i will bet you wouldnt. 

This other one was actually encouraging in different way or making another person to do wrong thing.

So abet means assist or encourage to do wrong things. A+bet

Example :

He was also punished as he was proved to be abetted to the murderer.