a person who abets.
Origin of abettor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for abetter
Historical Examples of abetter
It is really too bad, that the Primate of Ireland, of all men living, should be made the abetter in two fallacies.
They occasionally raised themselves on their hind-legs to get abetter view.The Expression of Emotion in Man and Animals