名詞 refractory:

1. lining consisting of material with a high melting point; used to line the inside walls of a furnace
   同義詞：furnace lining

形容詞 refractory:

1. not responding to treatment
   同義詞：stubborn
2. temporarily unresponsive or not fully responsive to nervous or sexual stimuli
3. stubbornly resistant to authority or control
   同義詞：fractious, recalcitrant

1. The state or quality of being stubborn or refractory.
   頑固，倔強頑固、固執(zhí)或倔強的狀態(tài)或性質

re.frac.to.ry

adj.（形容詞）
Obstinately resistant to authority or control.See Synonyms at unruly
執(zhí)拗的：頑固地不服從領導或控制參見 unruly
Difficult to melt or work; resistant to heat:
耐高溫的：難熔解的；耐熱的：
例句：
a refractory material such as silica.
如硅石等耐熱材料

Resistant to treatment:
難治愈的：
例句：
a refractory case of acne.
一種難治愈的痤瘡

n.（名詞）
【復數】 re.frac.to.ries
One that is refractory.
倔強的人
Material that has a high melting point.
耐火材料：有較高熔點的物質

來源：
Alteration influenced by adjectives in -ory
受 -ory中的形容詞影響
of obsolete refractary
廢語 refractary的變化
from Latin refr3ct3rius
源自 拉丁語 refr3ct3rius
from refr3ctus [past participle of] refringere [to break up] * see refract
源自 refr3ctus [] refringere的過去分詞 [打碎] *參見 refract

【引伸】
refrac.torily
adv.（副詞）
refrac.toriness
n.（名詞）