nebulously

/ˈnɛbjələsli/
adverb
  1. In a vague, unclear, or indefinite way; without precise form or detail.
    • The instructions were written so nebulously that no one knew what to do.
    • The shape of the creature was only nebulously visible through the thick fog.
    • She spoke nebulously about her plans for the future, avoiding any firm commitments.