| brutal |
| claiming(verb, dispute, important, question, serious) |
| complicated(adjective, hard, tough, rough, difficult) |
| curt(adjective, severe, keen, violent, anxious) |
| determined(adjective, persistent, obstinate, insistent, dogged) |
| dictatorial |
| difficile(adjective, tough, severe, rough, difficult) |
| dour(adjective, severe) |
| hard-hearted |
| hidebound(adjective, severe, persistent, obstinate, insistent) |
| hot-tempered(adjective, keen, violent, anxious, eager) |
| imperative |
| imperious |
| importunate(adjective, hard, tough, firm, difficult) |
| intense(adjective, severe, difficult, strenuous, stressful) |
| intolerant(adjective, severe, keen, plain, violent) |
| intractable(adjective, tough, persistent, obstinate, problematic) |
| keen(adjective, severe, violent, anxious, eager) |
| nagging(adjective, hard, tough, severe, harsh) |
| persnickety(adjective, harsh, critical, thorough, particular) |