Vocabulary Lesson 19 refractory - resistant to authority or control; resistant to treatment fragment - a small part broken off or detached; to break or separate something into small pieces infraction - a violation of a law or rule frail - physically weak or delicate; easily broken or destroyed osprey - a large fish-eating bird infringe - to trespass or encroach on; to violate or go beyond the limits of fritter - to reduce or squander little by little defray - to undertake the payment of costs or expenses fractious - troublesome; unruly; irritable fractional- relatively small