treasonously

English

Etymology

From treasonous +‎ -ly.

Adverb

treasonously (comparative more treasonously, superlative most treasonously)

  1. In a treasonous manner, or to a treasonous degree
    • 2009 January 23, Eve M. Kahn, “Conversation-Piece Buys, Maybe. Intriguing Histories, Definitely.”, in The New York Times[1], archived from the original on 8 June 2020:
      [] British potters in Liverpool treasonously inscribed pro-American slogans on 1810s pitchers for the lucrative export trade ($2,000 to $6,000 at William R. and Teresa F. Kurau).