What is cunning or sly; sportively mischievous; roguish; as, an arch look, word, lad. [He] spoke his request with so arch a leer. Tatler called?

arch — Cunning or sly; sportively mischievous; roguish; as, an arch look, word, lad. [He] spoke his request with so arch a leer. Tatler. (Webster's 1913.)

Sources