knotty
adjective /ˈnɒti/
/ˈnɑːti/
(comparative knottier, superlative knottiest)
- complicated and difficult to solve
复杂的；难以解决的；棘手的 - a knotty problem
棘手的问题
- a knotty problem
- having parts that are hard and twisted together
有节的；缠绕在一起的 - the knotty roots of the old oak tree
盘根错节的老橡树根
- the knotty roots of the old oak tree