| intricate(adjective, characteristic, difficulty, hardship) |
| involved(adjective, characteristic, difficulty, hardship) |
| irksome(adjective, characteristic, burden, problem) |
| irritable(adjective, characteristic, difficulty, hardship) |
| irritating(adjective, characteristic, difficulty, hardship) |
| knotty(adjective, characteristic, difficulty, hardship) |
| labored(adjective, characteristic, difficulty, hardship) |
| laborious(adjective, characteristic, difficulty, hardship) |
| laboured(adjective, characteristic, difficulty, hardship) |
| labyrinthine(adjective, characteristic, difficulty, hardship) |
| lofty(adjective, characteristic, difficulty, complication) |
| loose(adjective, characteristic, difficulty, hardship) |
| meandering(adjective, characteristic, difficulty, hardship) |
| mysterious(adjective, characteristic, difficulty, hardship) |
| mystical(adjective, characteristic, difficulty, hardship) |
| mystifying(adjective, characteristic, difficulty, hardship) |
| oafish(adjective, characteristic, difficulty, hardship) |
| obscure(adjective, characteristic, difficulty, hardship) |
| obstinate(adjective, characteristic, difficulty, hardship) |
| obstreperous(adjective, characteristic, difficulty, hardship) |