| gag(noun, fancy, humor, impulse, quirk) |
| gap(noun, weakness, fault, lack, lapse) |
| hesitation(noun, anxiety, weakness, uncertainty, fluctuation) |
| hurry(noun, activity, movement, anxiety, agitation) |
| imbalance(noun, anxiety, weakness, uncertainty, unpredictability) |
| immaturity(noun, anxiety, weakness, uncertainty, fluctuation) |
| impairment(noun, weakness, fault, lack, lapse) |
| imperfection(noun, weakness, fault, lack, lapse) |
| impotence(noun, weakness, fault, lack, lapse) |
| impulse(noun, fancy, humor, quirk, whim) |
| inclination(noun, weakness, fault, lack, lapse) |
| inconsistence |
| inconstant |
| infirmity of purpose(expression, idiom) |
| inquietude(noun, activity, movement, anxiety, weakness) |
| insomnia(noun, activity, movement, anxiety, agitation) |
| invalidity(noun, weakness, fault, lack, lapse) |
| jerk(noun, fancy, humor, impulse, quirk) |
| jitters(noun, activity, movement, anxiety, agitation) |
| jumpiness(noun, activity, movement, anxiety, agitation) |