Noah Webster's Dictionary (a.) Prone to anger; easily provoked or inflamed to anger; choleric; as, an irascible temper or mood.

Multi-Version Concordance Irascible (1 Occurrence) Titus 1:7 for it behoveth the overseer to be blameless, as God's steward, not self-pleased, nor irascible, not given to wine, not a striker, not given to filthy lucre; (YLT)