Main entry: fractious, cranky, scratchy, irritable, peckish, peevish, pettish, petulant, nettlesome, techy, testy, tetchy
Definition: easily irritated or annoyed
Usage: an incorrigibly fractious young man; not the least nettlesome of his countrymen
Main entry: excitable, irritable
Definition: capable of responding to stimuli
Main entry: irritable
Definition: abnormally sensitive to a stimulus