Letters that make waggish
s, a, g, h, i, w are letters that make 'waggish'
1 possible definitions for 'waggish'
Under this definition, waggish is an adjective and has the following properties:
waggery, waggishness are derivatives of 'waggish'.
"Muskrat Castle as the house has been facetiously named by some waggish officer"- James Fenimore Cooper