1. most full of knots or tangles
Usage: superlative form of knotty
2. most difficult or complex to solve or understand
Usage: figurative use; superlative form of knotty

Examples

• The knottiest piece of wood was impossible to split cleanly.
• Her hair was the knottiest after swimming in the ocean.
• This is the knottiest math problem I’ve ever encountered.
• The knottiest part of the negotiation involved the budget.
• He tackled the knottiest issues first to get them out of the way.
• The rope’s knottiest section couldn’t be untangled.
• She saved the knottiest philosophical questions for last.