Definition of "archness"

Marianne was surprised and confused, yet she could not help smiling at the quiet archness of his manner

1811, Jane Austen, chapter 18, in Sense and Sensibility

Meanwhile the farce was going on very successfully, and Mrs. Leary, in a hussar jacket and braided pantaloons, was enchanting the audience with her archness, her lovely figure, and her delightful ballads.

1848 November – 1850 December, William Makepeace Thackeray, chapter 29, in The History of Pendennis. […], volumes (please specify |volume=I or II), London: Bradbury and Evans, […], published 1849–1850

There was something artless in Toby's delivery; he was working in the family tradition of teasing, but he was too relenting and couldn't yet match Gerald's heavy archness.

2004, Alan Hollinghurst, chapter 3, in The Line of Beauty […], 1st US edition, New York, N.Y.: Bloomsbury Publishing