Definition for Treacherously:

• Faithlessly; perfidiously.

Synonyms for Treacherously:

• adv

  •falsely (adverb)
  • disloyally,
  • behind ones back,
  • perfidiously.

• adv.

  •dangerously (adverb)
  • hazardously,
  • unsafely,
  • threateningly,
  • menacingly,
  • perilously,
  • ominously,
  • dangerously.
  •dishonestly (adverb)
  • deviously,
  • hypocritically,
  • fraudulently,
  • immorally,
  • corruptly,
  • unscrupulously,
  • crookedly,
  • craftily,
  • deceitfully,
  • feloniously,
  • insincerely,
  • dishonorably,
  • underhandedly.
  •disobediently (adverb)
  • rebelliously,
  • subversively,
  • seditiously,
  • factiously,
  • mutinously,
  • insubordinately,
  • disobediently.
  •falsely (adverb)
  • maliciously,
  • roguishly,
  • treacherously,
  • behind one's back,
  • unfaithfully,
  • falseheartedly,
  • basely,
  • malevolently.
  •treacherously (adverb)
  • riskily,
  • chancily,
  • Difficultly.

• n.

  •false (noun)
  • false.
  •treacherously (noun)
  • treasonably.

• Other synonyms:

  •
  • untruthfully.

Antonyms for Treacherously:

• adv.

  • falsely
    truthfully.
  • treacherously
    harmlessly, safely, faithfully, loyally, honestly.

Treacherously Sentence Examples:

• 38. The old belief, defended by Von Sybel, was that Thugut himself had determined upon the evacuation of Belgium, and treacherously deprived Coburg of forces for its defence.

• Thanks to the watchfulness of the commander of the transport, the ship had been able to escape the torpedo so treacherously launched by the Germans; so no harm had been done.