Irritability
Part of speech: noun
Definition: The state or quality of being irritable; quick excitability; petulance; fretfulness; as, irritability of temper. A natural susceptibility, characteristic of all living organisms, tissues, and cells, to the influence of certain stimuli, response being manifested in a variety of ways. A condition of morbid excitability of an organ or part of the body; undue susceptibility to the influence of stimuli.
Fretfulness
Part of speech: noun
Definition: The quality of being fretful