| troubled(adjective, feature, quality, aspect) |
| demanding(adjective, difficulty, characteristics, toughness, feature) |
| tough(adjective, difficulty, characteristic, quality, situation) |
| arduous(adjective, feature, characteristic, quality, difficulty) |
| anfractuous(adjective, feature, quality, aspect) |
| abstruse(adjective, characteristic, difficulty, toughness) |
| bewildering(adjective, characteristic, situation, problem) |
| burdensome(adjective, characteristic, difficulty, toughness) |
| challenging(adjective, difficulty, situation, sharacteristic) |
| composite(adjective, difficulty, situation, sharacteristic) |
| compound(adjective, difficulty, situation, sharacteristic) |
| confused(adjective, characteristic, situation, problem) |
| confusing(adjective, characteristic, situation, problem) |
| cumbersome(adjective, characteristic, situation, problem) |
| daedal(adjective, quality, difficulty, problem) |
| elaborate(adjective, characteristic, situation, problem) |
| exhausting(adjective, characteristic, difficulty, toughness) |
| gordian(adjective, characteristic, situation, problem) |
| heavy(adjective, quality, difficulty, problem) |
| implex(adjective, quality, difficulty, problem) |