fractious

stubbornly resistant to authority or control

• “a fractious animal that would not submit to the harness”
• “a refractory child”

easily irritated or annoyed

• “an incorrigibly fractious young man”
• “not the least nettlesome of his countrymen”

unpredictably difficult in operation; likely to be troublesome

• “rockets were much too fractious to be tested near thigkly populated areas”
• “fractious components of a communication system”