Definition of "aider"
aider
noun
plural aiders
Quotations
[…] being there as an assistant, he actually seemed—[…]—to be the aider and abettor of a system which filled him with honest disgust and indignation, […]
1838 March – 1839 October, Charles Dickens, “Of the Internal Economy of Dotheboys Hall”, in The Life and Adventures of Nicholas Nickleby, London: Chapman and Hall, […], published 1839, page 73