The Collaborative International Dictionary
Irascibleness
Irascible \I*ras"ci*ble\, a. [L. irascibilis, fr. irasci to be angry, ira anger: cf. F. irascible. See Ire.] Prone to anger; easily provoked or inflamed to anger; choleric; irritable; as, an irascible man; an irascible temper or mood. -- I*ras"ci*ble*ness, n. -- I*ras"ci*bly, adv.
Wiktionary
irascibleness
n. The state of being irascible; irascibility.