| unmerciful(adjective, mean, tough, severe, harsh) |
| uphill(adjective, great, tough, easy, severe) |
| sinister(adjective, person, sad, unhappy, unpleasant) |
| agonizing(adjective, pain, sickness, ache, anguishes) |
| angry(adjective, person, rough, cruel, painful) |
| caustic(adjective, pain, sickness, ache, anguishes) |
| distressing(adjective, rough, difficult, harsh, tender) |
| effortful(adjective, great, tough, difficult, harsh) |
| forcibly(adverb, strong, fast, severely, intensely) |
| hardy(noun, adjective, person, body, strong) |
| incontrovertible(adjective, clear, certain, true, sure) |
| inhumane(adjective, person, mean, tough, severe) |
| malevolent(adjective, person, mean, evil, nasty) |
| time-consuming |
| unsentimental(adjective, sound, tough, reasonable, sensible) |
| wearying(adjective, dull, difficult, awkward, boring) |
| Spartan |
| alcoholic(adjective, alcohol, ingestion, intoxicating) |
| badly(adverb, severely, poorly, hardly, strictly) |
| barbaric(adjective, person, unwarmhearted) |