| disciplined(adjective, severe) |
| explicit(adjective, strong, correct, flat, solid) |
| fixed(adjective, strong, hard, severe, stiff) |
| intolerant(adjective, severe, plain, straightforward, stern) |
| keen(adjective, severe, sharp, exact, discriminating) |
| letter-perfect(adjective, exact, scrupulous, detailed) |
| narrow-minded(adjective, persistent, obstinate, insistent, dogged) |
| neat(adjective, exact, scrupulous, detailed) |
| nonindulgent |
| perfect(adjective, correct, right, exact, proper) |
| regular(adjective, correct, right, appropriate, solid) |
| resolute(adjective, close, strong, hard, tough) |
| single-minded(adjective, tough, firm, harsh, cruel) |
| stark(adjective, severe) |
| strong(adjective, hard, tough, severe, flat) |
| unapologetic |
| unchanging(adjective, close, correct, severe, harsh) |
| undistorted(adjective, close, correct, right, appropriate) |
| unfeeling(adjective, tough, severe, harsh, cruel) |
| unrelenting(adjective, strong, hard, tough, severe) |