| brutally(adverb, fast, sprightly, severely, seriously) |
| decidedly(adverb, resolutely) |
| earnestly(adverb, fast, sprightly, seriously, intensely) |
| energetically(adverb, fast, sprightly, seriously, intensely) |
| faithfully(adverb, resolutely) |
| harshly |
| inhumanly(adjective, adverb, cruel, evil way) |
| meanly(adverb, cruel, fast, sprightly, severely) |
| rigidly |
| staunchly(adverb, resolutely) |
| tenaciously(adverb, resolutely, determinedly, persistently) |
| tirelessly(adverb, forever, resolutely, repeatedly) |
| viciously(adverb, cruel, fast, sprightly, severely) |
| constantly(adverb, relentless, on, usually, continuously) |
| continually(adverb, usually, regularly, nonstop, constantly) |
| determinedly(adverb, resolutely) |
| devotedly(adverb, resolutely) |
| ferociously(adverb, fast, sprightly, severely, intensely) |
| firmly(adverb, fast, intensely, fiercely, violently) |
| hardly |