From Middle French acoyer, from a- + coi (“quiet, calm”).
accoy (third-person singular simple present accoys, present participle accoying, simple past and past participle accoyed)
- (obsolete) To soothe, to calm; to assuage, to subdue. [14th-19th c.]
1596, Edmund Spenser, The Faerie Queene, IV.8:
- Of faire Pœana I received was, / And oft imbrast, as if that I were hee, / And with kind words accoyd, vowing great love to mee.