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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  thorny
       adj 1: bristling with perplexities; "the thorny question of states'
              rights"
       2: having or covered with protective barbs or quills or spines
          or thorns or setae etc.; "a horse with a short bristly
          mane"; "bristly shrubs"; "burred fruits"; "setaceous
          whiskers" [syn: barbed, barbellate, briary, briery,
           bristled, bristly, burred, burry, prickly, setose,
           setaceous, spiny]
       [also: thorniest, thornier]