Definitions

1. adjective

most complex or difficult to understand, manage, or solve

“The knottiest part of the problem was figuring out the solution to the equation.”

2. noun

the most complex or difficult part of something

“The knottiest issue facing the government was how to balance the budget.”

3. superlative of knotty

most stubbornly or tightly entangled or knotted

“The knottiest of all the vines were the ones that grew near the river.”