| mean(adjective, severe, harsh, cruel, pitiless) |
| mean machine(expression, adjective, mean, severe, harsh) |
| merciless(adjective, mean, cruel, persistent, constant) |
| mortal(adjective, mean, severe, harsh, cruel) |
| no-nonsense(adjective, tough, severe, firm, harsh) |
| oppressive(adjective, tough, severe, firm, harsh) |
| perpetual(adjective, persistent, constant, pitiless, unyielding) |
| persistent(adjective, constant, pitiless, unyielding, endless) |
| picky(adjective, tough, severe, firm, harsh) |
| pitiless(adjective, mean, severe, harsh, cruel) |
| poignant(adjective, severe, harsh, stiff, rigid) |
| powerful(adjective, severe, harsh, stiff, rigid) |
| prudish(adjective, tough, severe, firm, harsh) |
| punctilious(adjective, tough, severe, firm, harsh) |
| puritanical(adjective, tough, severe, firm, harsh) |
| relentless(adjective, mean, severe, harsh, cruel) |
| remorseless(adjective, persistent, constant, pitiless, unyielding) |
| rigid(adjective, tough, severe, firm, harsh) |
| rigorous(adjective, tough, severe, firm, harsh) |
| rough(adjective, severe, harsh, stiff, rigid) |