delphically

/ˈdɛlfɪkli/
adverb
  1. In a way that is deliberately vague, mysterious, or ambiguous.
    • The professor answered delphically, leaving the students more puzzled than before.
    • The instructions were written delphically, as if the author wanted to confuse the reader.
    • She smiled delphically and refused to explain what she meant.
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