| cruel-hearted |
| cussed(adjective, rude, energetic, coarse, hostile) |
| dangerous(adjective, strong, severe, intense, unpleasant) |
| demoniacal |
| diabolic |
| difficult(adjective, energetic, lively, awkward, irritable) |
| dirty(adjective, unpleasant, horrible, vulgar, disagreeable) |
| discordant |
| disgruntled(irritable, bad-tempered, cranky) |
| dour(adjective, rude, unpleasant, coarse, polite) |
| enemy |
| excitable(difficult, lively, irritable, fiery, turbulent) |
| fiendlike |
| fiery(strong, difficult, violent, lively, turbulent) |
| filthy(adjective, unpleasant, horrible, vulgar, disagreeable) |
| fire-eating(energetic, antagonistic, aggressive, argumentative, contentious) |
| flip(nasty, determined, hostile, spirited, aggressive) |
| fractious(adjective, difficult, hostile, turbulent, abrupt) |
| frightful(adjective, appearance, violent, terrible, cruel) |
| frisky(adjective, energetic, lively, aggressive, fiery) |