treacherously

English

Etymology

From treacherous +‎ -ly.

Pronunciation

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Adverb

treacherously (comparative more treacherously, superlative most treacherously)

  1. In a treacherous manner.
    Synonyms: dastardly, traitorly, traitorwise; see also Thesaurus:treacherously
    The former spy behaved treacherously.

Translations