impish

Etymology

imp + -ish

adj

1. mischievous; of or befitting an imp.
   Wild-eyed youngsters they were, with matted hair and little broad-nosed impish faces, covered (as some children are covered even nowadays) with a delicate down of hair. 1897, H. G. Wells, chapter 1, in A Story of the Stone Age, archived from the original on 2012-03-09
   But the antics of Mr. Moore, though impish and impudent, are, after all, so amusing and so graceful that the governess, it is said, sometimes hides behind a tree to watch. 1942, Virginia Woolf, chapter 20, in The Death of the Moth, and other essays, archived from the original on 2011-02-24