| complex(adjective, upset, hard, simple, difficult) |
| intricate(adjective, hard, complete, simple, fancy) |
| difficult(adjective, hard, difficult, delicate, complex) |
| involved(verb, adjective, hard, simple, difficult) |
| elaborate(adjective, hard, complete, simple, fancy) |
| knotty(adjective, hard, simple, evil, difficulty) |
| labyrinthine(adjective, hard, simple, difficulty, difficult) |
| byzantine(adjective, hard, simple, difficult, complex) |
| hard(adjective, difficult, complex, awkward, tedious) |
| perplexed(verb, adjective, hard, difficult, complex) |
| sophisticated(adjective, hard, difficult, complex, involved) |
| thorny(adjective, hard, difficulty, difficult, delicate) |
| arduous(adjective, hard, difficult, complex, awkward) |
| tricky(adjective, hard, difficult, delicate, complex) |
| compound(adjective, hard, difficult, complex) |
| daedal(adjective, hard, simple, difficult, complex) |
| knotted(adjective, hard, difficulty, difficult, complex) |
| tough(adjective, hard, difficult, complex) |
| Gordian(adjective, hard, difficult, complex, involved) |
| laborious(adjective, hard, difficult, complex, awkward) |