| capricious |
| deficient |
| feisty(adjective, spirited, touchy) |
| flip(adjective, nasty, informal, determined, hostile) |
| fractious(adjective, cross, hostile, irritable, restless) |
| gladiatorial(energetic, antagonistic, aggressive, radical, belligerent) |
| harsh(adjective, hostile, belligerent, quarrelsome) |
| hot(adjective, nasty, informal, determined, hostile) |
| hot-tempered(adjective, nasty, determined, hostile, spirited) |
| inimical(mean, nasty, unfriendly, angry, antagonistic) |
| irregular |
| nasty(adjective, mean, hostile, unfriendly, angry) |
| niggardly(adjective, poor, small, boring, exiguous) |
| obstreperous(adjective, mean, sharp, harsh, cross) |
| opinionated(adjective, contrary, belligerent, argumentative, contentious) |
| rude(adjective, hostile, belligerent, quarrelsome) |
| skimpy(adjective, poor, small, boring, exiguous) |
| sullen(adjective, mean, sharp, harsh, cross) |
| surly(adjective, mean, nasty, hostile, unfriendly) |
| trigger-happy(energetic, antagonistic, aggressive, argumentative, contentious) |