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peak +‎ -y



peaky (comparative peakier, superlative peakiest)

  1. Sickly; peaked.
    • 1956 [1880], Johanna Spyri, Heidi, translation of original by Eileen Hall, page 111:
      Her appetite did not improve, however, and she looked very thin and peaky.
  2. Characterised by peaks.
    • Alfred, Lord Tennyson
      over hills with peaky tops engrail'd
    • 1994, John S. Hares, ‎Duncan Royle, Measuring the value of information technology (page 176)
      A wide spread of possible outcomes will give a relatively flat distribution and so indicate a risky project. A narrow spread of results will give a very peaky graph and indicate a low risk project.