| can of worms(expression, adjective, idiom, hard, fancy) |
| labyrinth |
| complex(adjective, hard, fancy, difficult, intricate) |
| snafu |
| Daedalean(adjective, hard, fancy, difficult, complex) |
| Gordian(adjective, hard, fancy, difficult, complex) |
| abstruse(adjective, hard, fancy, difficult, complex) |
| action |
| arduous(adjective, hard, fancy, difficult, complex) |
| byzantine(adjective, hard, fancy, difficult, complex) |
| clockworks |
| convoluted(adjective, hard, fancy, difficult, complex) |
| difficult(adjective, hard, fancy, complex, intricate) |
| drive train |
| elaborate(adjective, hard, fancy, difficult, complex) |
| entangled(adjective, hard, fancy, difficult, complex) |
| fancy(adjective, hard, difficult, complex, intricate) |
| gasser(adjective, hard, fancy, difficult, complex) |
| gear |
| hard(adjective, fancy, difficult, complex, intricate) |