refractorily


re·frac·to·ry

R0118800 (rĭ-frăk′tə-rē)adj.1. Showing or characterized by obstinate resistance to authority or control: refractory children; refractory behavior.2. Difficult to melt or work; resistant to heat: a refractory material such as silica.3. Resistant to treatment: a refractory case of acne.n. pl. re·frac·to·ries One that is refractory, especially a material that has a high melting point.
[Alteration (influenced by adjectives in -ory) of obsolete refractary, from Latin refrāctārius, from refrāctus, past participle of refringere, to break up; see refract.]
re·frac′to·ri·ly adv.re·frac′to·ri·ness n.