Definitions

1. adjective

having knots or being knotty; difficult to understand or deal with; obstinately stubborn or uncooperative

“He had a knotty problem to solve, and it took him days to figure it out.”

2. noun

a knot or a knotty part in something

“There was a knotty branch on the tree that was difficult to climb.”

3. verb

to make knots or become knotty

“The rope began to knotty as it dried in the sun.”