knot·ty /ˈnɑti/
  (a.)有結的,多節的,多瘤的,棘手的
  Knot·ty a. [Compar. Knottier superl. Knottiest.]
  1. Full of knots; knotted; having many knots; as, knotty timber; a knotty rope.
  2. Hard; rugged; as, a knotty head. [R.]
  3. Difficult; intricate; perplexed.
     A knotty point to which we now proceed   --Pope.
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  knotty
       adj 1: making great mental demands; hard to comprehend or solve; "a
              baffling problem"; "I faced the knotty problem of what
              to have for breakfast"; "a problematic situation at
              home" [syn: baffling, problematic, problematical]
       2: used of old persons or old trees; covered with knobs or
          knots; "gnarled and knotted hands"; "a knobbed stick"
          [syn: gnarled, gnarly, knotted, knobbed]
       3: highly involved or intricate; "the Byzantine tax structure";
          "convoluted legal language"; "convoluted reasoning";
          "intricate needlework"; "an intricate labyrinth of refined
          phraseology"; "the plot was too involved"; "a knotty
          problem"; "got his way by labyrinthine maneuvering"; "Oh,
          what a tangled web we weave"- Sir Walter Scott; "tortuous
          legal procedures"; "tortuous negotiations lasting for
          months" [syn: Byzantine, convoluted, intricate, involved,
           labyrinthine, tangled, tortuous]
       [also: knottiest, knottier]