Crossword clues for the word: TREASONOUS The word TREASONOUS has appeared as an answer to at least 9 crossword clues on different crossword puzzles. Crossword clues for TREASONOUS Showing 1 to 9 of 9 results Clue(s) "Spying against one's own country, say" Arnold-esque? Breaking faith Disloyal Disloyal to the state Fomenting subversion Like Arnold's action Showing perfidy. UnfaithfulArnold-esque?