Impatient

Not patient; not bearing with composure; intolerant; uneasy; fretful; restless, because of pain, delay, or opposition; eager for change, or for something expected; hasty; passionate; -- often followed by at, for, of, and under.

Not to be borne; unendurable.

Prompted by, or exhibiting, impatience; as, impatient speeches or replies.

One who is impatient.