Truant : a pupil who stays away from school without leave or explanation. Inveterate : having a particular habit, activity, or interest that is long-established and unlikely to change. Rash : acting or done without careful consideration of the possible consequences; impetuous. Dishonest : behaving or prone to behave in an untrustworthy, deceitful, or insincere way. Incorrigible : (of a person or their behaviour) not able to be changed or reformed.