| distressing(adjective, severe, rough, harsh, tender) |
| particular(adjective, harsh, rigid, meticulous, fussy) |
| puzzling(adjective, hard, fancy, obscure, strange) |
| rigorous(adjective, hard, severe, rough, harsh) |
| uncomfortable(adjective, rough, painful, sickness, ache) |
| unpleasant(adjective, hard, severe, evil, rough) |
| uphill(adjective, hard, great, tough, easy) |
| hairy(noun, adjective, hard, severe, rough) |
| intractable(adjective, tough, obstinate, stubborn, problematic) |
| not good(expression, idiom) |
| baffling(adjective, hard, obscure, strange, uncertain) |
| contrary(adjective, support, tough, attitude, rude) |
| finical(adjective, demanding, scrupulous, particular, meticulous) |
| obstinate(adjective, hard, tough, stubborn, complicated) |
| stiff(adjective, hard, tough, severe, rough) |
| tiring(adjective, dull, tough, awkward, boring) |
| whiny(adjective, rude, unpleasant, negative, unfriendly) |
| deep(adjective, hard, severe, meaning, abstract) |
| mysterious(adjective, hard, obscure, strange, complex) |
| recondite(adjective, hard, fancy, obscure, strange) |