| hot under collar(expression, adjective, idiom, keen, violent) |
| huffish |
| huffy(adjective, difficult, irritable, touchy, argumentative) |
| hysterical(nervous, emotional, restless, volatile, fiery) |
| igneous(adjective, intense, violent, hot, fierce) |
| ill-humoured |
| impassioned(difficult, intense, passionate, violent, hot) |
| in flames(expression, adjective, intense, violent, hot) |
| indignant(adjective, keen, violent, anxious, eager) |
| inflamed(adjective, intense, violent, hot, fierce) |
| inflammable(nervous, sensitive, emotional, restless, volatile) |
| intolerant(adjective, keen, violent, anxious, nervous) |
| itchy(adjective, keen, violent, anxious, eager) |
| keen(adjective, sharp, violent, lively, anxious) |
| like a bear(expression, idiom, irritable, ugly, crabby) |
| litigious(adjective, difficult, irritable, argumentative) |
| madcap(adjective, intense, violent, hot, fierce) |
| mean(nasty, determined, hostile, irritable, disagreeable) |
| mercurial(passionate, nervous, emotional, restless, unpredictable) |
| militant(nasty, determined, hostile, spirited, aggressive) |