refractory
/ɹɪˈfɹæk.təɹ.i/
noun
- 1
A material or piece of material, such as a brick, that has a very high melting point.
adjective
- 1
Obstinate and unruly; strongly opposed to something.
- 2
Not affected by great heat.
- 3
Difficult to treat.
- 4
Incapable of registering a reaction or stimulus.
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