| inexplicable(adjective, difficulty, situation, sharacteristic) |
| inextricable(adjective, quality, difficulty, problem) |
| involute(adjective, quality, difficulty, problem) |
| laboured(adjective, feature, quality, problem) |
| labyrinthine(adjective, characteristic, situation, problem) |
| multiplex(adjective, quality, difficulty, problem) |
| overcomplex(adjective, difficulty, situation, sharacteristic) |
| overcomplicated(adjective, difficulty, situation, sharacteristic) |
| perplexing(adjective, characteristic, situation, problem) |
| problematical(adjective, characteristic, difficulty, toughness) |
| puzzling(adjective, characteristic, situation, problem) |
| recondite(adjective, characteristic, difficulty, toughness) |
| sophisticated(adjective, quality, difficulty, problem) |
| stressful(adjective, characteristic, difficulty, toughness) |
| tangled(adjective, characteristic, situation, problem) |
| tangly(adjective, quality, difficulty, problem) |
| tight(adjective, feature, quality, problem) |
| tortuous(adjective, characteristic, situation, problem) |
| trick(adjective, quality, difficulty, problem) |
| trickish(adjective, quality, difficulty, problem) |