| grating(adjective, quiet, hard, severe, sharp) |
| compound(adjective, hard, difficult, complex) |
| heavy-handed(adjective, hard, difficult, rude, complex) |
| intricate(adjective, hard, difficult, complex, awkward) |
| knotted(adjective, hard, difficult, complex) |
| messy(adjective, hard, difficult, unpleasant, complex) |
| operose(adjective, hard, difficult, complex, awkward) |
| sad(adjective, hard, poor, nasty, difficult) |
| sore(adjective, hard, difficult, complex) |
| stressful(adjective, hard, difficult, complex) |
| taxing(adjective, hard, difficult, heavy, complex) |
| weighty(adjective, hard, difficult, heavy, complex) |
| jagged(adjective, mean, smooth, severe, sharp) |
| lumpish(adjective, hard, difficult, complex, ugliness) |
| disturbing(adjective, hard, severe, difficult, complex) |
| elaborate(adjective, hard, difficult, complex) |
| grave(adjective, hard, difficult, unpleasant, complex) |
| hard-nosed(adjective, strong, hard, tough, severe) |
| hefty(adjective, hard, difficult, complex) |
| involved(adjective, hard, difficult, complex, awkward) |