| anfractuous(adjective, hard, difficult, complex, straight) |
| winding(verb, adjective, obscure, straight, sophisticated) |
| labyrinthine(adjective, hard, difficult, complex) |
| complex(adjective, hard, difficult) |
| complicated(adjective, hard, difficult, complex) |
| intricate(adjective, hard, difficult, complex) |
| Byzantine(adjective, hard, difficult, complex) |
| knotty(adjective, hard, difficult, complex) |
| serpentine(adjective, straight, bent, crooked, repetition) |
| daedal(adjective, hard, difficult, complex) |
| involute(adjective, hard, difficult, complex) |
| knotted(adjective, hard, difficult, complex) |
| Gordian(adjective, hard, difficult, complex) |
| elaborate(adjective, hard, difficult, complex) |
| involved(adjective, hard, difficult, complex) |
| tortuous(adjective, obscure, straight, sophisticated, crooked) |
| curved(adjective, round, bent, crooked, supple) |
| flexuous(adjective, straight, repetition, twisting, convolution) |
| crooked(adjective, irregular, round, bent, ambiguous) |
| circuitous(adjective, obscure, sophisticated, crooked, ambiguous) |