Thorn·y a. [Compar. Thornier superl. Thorniest.]
  1. Full of thorns or spines; rough with thorns; spiny; as, a thorny wood; a thorny tree; a thorny crown.
  2. Like a thorn or thorns; hence, figuratively, troublesome; vexatious; harassing; perplexing. “The thorny point of bare distress.”
     The steep and thorny way to heaven.   --Shak.
  Thorny rest-harrow Bot., rest-harrow.
  Thorny trefoil, a prickly plant of the genus Fagonia (Fagonia Cretica, etc.).
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