a ‧ bet /əˈbet/ BrE AmE verb ( past tense and past participle abetted , present participle abetting ) [transitive]
[ Date: 1300-1400 ; Language: Old French ; Origin: abeter , from beter 'to bait' ]
to help someone do something wrong or illegal
⇨ aid and abet at ↑ aid 2 (3)