#aridity__fruitlessnes__barrennes  a condition yielding nothing of value
  exclusion:  #fruitfulness
  supertype:  #quality  an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare
  subtype:  #poorness.aridity  less than adequate; "the relative poorness of New England farmland"
  subtype:  #unproductiveness  the quality of lacking the power to produce

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