Related Clues:

• Intricate
• In a tangle
• Baffling
• Complicated
• Like some pines
• Complex, as a problem
• Like a cat-o'-nine-tails
• Full of difficulties
• Tough to solve
• Difficult to disentangle
• Complicated, as a problem
• Tough to figure out
• Type of pine
• Like many bows
• Seemingly unsolvable