knotty

🇬🇧/ˈnɒti/ 🇺🇸/ˈnɑːti/📚 25025四级六级GRE
A knotty problem is complicated and difficult to solve. 复杂的; 难以解决的

adjective [原级]难以解决的,棘手的;(木头表面)多节(疤)的

The new management faces some knotty problems.
新的管理层面临着一些棘手的问题。

来自knot(n. 节疤)
单词造句:
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It was a knotty question. 这是一个棘手的问题。
Einstein would furiously play his violin as a way to think through a knotty physics problem. 爱因斯坦会以疯狂地拉小提琴的方式来思考一个复杂的物理问题。