Impatience n.
Etymology: [OE. impacience, F. impatience, fr. L. impatientia.]
The quality of being impatient; want of endurance of pain, suffering, opposition, or delay; eagerness for change, or for something expected; restlessness; chafing of spirit; fretfulness; passion; as, the impatience of a child or an invalid. I then, . . . Out of my grief and my impatience, Answered neglectingly. Shak. With huge impatience he inly swelt More for great sorrow that he could not pass, Than for the burning torment which he felt. Spenser.
Shades of meaning
Fernald has no entry of its own for impatience; he lists it under anger.
Where he writes about it:
Impatience, fretfulness, irritation, peevishness, pettishness, petulance, and vexation express the slighter forms of anger. — from anger