English

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Alternative forms

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Etymology

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    From traitorous + -ly.

    Adverb

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    traitorously (comparative more traitorously, superlative most traitorously)

    1. In a traitorous manner; treacherously.
      Synonyms: dastardly, traitorly, traitorwise; see also Thesaurus:treacherously
      The vizier traitorously revealed the location of the hiding princess in order to save himself.