Related Clues:
- Difficult to disentangle
- Fraught, as an issue
- Complicated, as a problem
- Tough to figure out
- Type of pine
- Seemingly unsolvable
- Too complex to solve
- Like roads with many potholes
- Causing jolts
- Difficult like briar
- Troublesome or difficult, like briars?
- Troublesome or difficult - having spikes?
- Tree trunk with hard masses - it's problematic
- Rough to the touch or salacious
- Blow it inside to be so sharp