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Definition of refractory:

  1. A refractory person.
  2. Obstinate in disobedience; contumacious; stubborn; unmanageable; as, a refractory child; a refractory beast.
  3. OPottery) A piece of ware covered with a vaporable flux and placed in a kiln, to communicate a glaze to the other articles.
  4. Refractoriness.
  5. Resisting ordinary treatment; difficult of fusion, reduction, or the like; - said especially of metals and the like, which do not readily yield to heat, or to the hammer; as, a refractory ore.

Synonyms:

petulant, out of line, peckish, insubordinate, unregenerate, fractious, autoimmune, dogged, obstinate, control, naughty, unyielding, defiant, obstreperous, ungovernable, recalcitrant, nettlesome, stubborn, willful, hard, peevish, cranky, rigid, immovable, incontrollable, mulish, fixed, communicable, opinionated, irritable, uncontrollable, wild, testy, untoward, furnace lining, resolute, unruly, stiff, inflexible, wayward, chronic, persistent, lawless, undisciplined, heady, congenital, unmanageable, restive, intractable, asymptomatic, acute, pettish, disobedient, uncooperative, resist, headstrong, indocile, recusant, scratchy, froward, obdurate, clinical, resolved, rebel, advanced, benign, contumacious, balky, firm, order, pertinacious, tetchy, peace, rebellious, incompliant, mutinous, decided, catching, determined, unflinching, disorderly, techy, unconquerable, indomitable, contrary.

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