knotty
Definition
Full of knots; tangled or difficult to solve.
中文 充满节结的；缠结的或难以解决的。
Example
"The problem posed by the teacher was a knotty one, puzzling the whole class."
Full of knots; tangled or difficult to solve.
中文 充满节结的；缠结的或难以解决的。
"The problem posed by the teacher was a knotty one, puzzling the whole class."