knottiest
有结的
多节的
多瘤的
复杂的
棘手的（knotty 的最高级）
例句
Unemployment, being the knottiest issue of all, has been relegated for now to the back burner.
失业是最棘手的问题，暂时已搁置起来，以后。
Even so, by using his chosen questions like wedges, Mr. Kolakowski succeeds in splitting open even the knottiest systems.
即便如此，科拉柯夫斯基先生把像这些挑选的问题当作楔子一样使用，成功地切开最纠缠不清的体系。
It has became the knottiest problem for parents to deal with their children's "problem behaviors" in the course of growing up.
如何处理孩子成长过程中的“问题行为”已成为许多父母最感棘手的问题。
