2 Verbs to Use for the Word volatility

Her exceeding volatility of temper, which was the cause of her instability, often occasioned her bitter reflections; and as it was a source of trouble to herself, excited the anxiety of her mother, who frequently said to her, "There's a wide world will tame thee."

Even here, remembering the volatility and sprightliness, inseparable from the age, humanity will induce him not to animadvert with warmth upon the appearances of a casual distraction, but he will rather solicit the return of attention by gentleness, than severity.

2 Verbs to Use for the Word  volatility