English

Adverb

guilefully ‎(comparative more guilefully, superlative most guilefully)

1. In a guileful manner.
   • 1596, Edmund Spenser, The Faerie Queene, V.11:

     Sith which she hath me ever since abhord, / And to my foe hath guilefully consented: / Ay me, that ever guyle in wemen was invented!