knottiest

adj.

（指木材）多结节的( knotty的最高级 )；多节瘤的；困难的；棘手的

1. This is a knotty passage.
   这是一段复杂难懂的文字。
2. She met with a lot of knotty problems.
   她碰上了许多棘手的问题。
3. It is almost impossible to skirt the knotty problem.
   想回避这个棘手的问题几乎是不可能的。

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