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REFRACTORY

Definition:

1. [noun] lining consisting of material with a high melting point; used to line the inside walls of a furnace
   Synonyms: furnace lining
   
   
2. [adjective] resistant to authority or control; "as refractory as a mule"
   
   
3. [adjective] not responding to treatment; "a stubborn infection"; "a refractory case of acne"
   Synonyms: stubborn
   
   
4. [adjective] marked by stubborn resistance to and defiant of authority or guidance; "a recalcitrant teenager"; "everything revolves around a refractory individual genius"
   Synonyms: recalcitrant
   
   
5. [adjective] stubbornly resistant to authority or control; "a fractious animal that would not submit to the harness"; "a refractory child"
   Synonyms: fractious
   
   

Synonyms:

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