Gylefulliche

Part of speech: adverb

Definitions

1. In a deceitful, sly or cunning way, as a person who tricks others to gain an advantage would act
2. Done with craft and trickery, intending to mislead or deceive someone for one's own purposes
3. Characterized by guile, acting in a crafty and underhanded manner to achieve a hidden aim

Etymology: Gylefulliche is an Old English adverb meaning "deceitfully" or "guilefully," built from the adjective "gyleful" (full of guile) with the adverbial ending "-lice," which became "-liche" and later "-ly." The adjective itself rests on "gile" or "gyle," meaning deceit or trickery, a word that entered Old English from Old Norse, where "gýla" carried the same sense of deception. The word is attested in Old English texts, and it is a useful reminder of how many English adverbs were made by simply attaching "-lice" to an adjective, a pattern that was productive for centuries before "-ly" took over. Its modern descendant "guilefully" keeps the same root and the same meaning, though the Old English spelling and the stressed syllable have changed considerably over the centuries.