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TOEFL BNC: 14277 COCA: 15239

impervious

Word family 
Related topics: Geology
im·per·vi·ous /ɪmˈpɜːviəs $ -ɜːr-/ adjectiveadj [not before noun]  
1  EFFECT/INFLUENCE formal not affected or influenced by something and seeming not to notice it 不受影响的；无动于衷的
impervious to
 His ego was impervious to self-doubt.
他从不自我怀疑。
2  HARD technical not allowing anything to enter or pass through 不能进入的，不能穿过的
 impervious volcanic rock
不透水的火山岩
impervious to
 materials that are impervious to water
不透水的物质
Examples from the Corpus
impervious• How could I have been so thick-headed, I wonder now, so impervious?• She was amazed at how little he wore and how impervious he was to the cold.• But even this normally impervious mucus is easily breached by ethanol.• Indeed, some individuals are quite impervious to cultural incentives, or even take pleasure in flouting them.• The evening air had its accustomed November nip, but the groups making their way from Celtic Crescent were impervious to it.• The trees everywhere over-grow the road, so that it is totally impervious to the sun, except at a few places.• Was it possible for anyone to be so impervious to the things he saw?
impervious to• The college administration seemed impervious to criticism.• The brass table top is impervious to liquids.
Origin impervious
(1600-1700) Latin impervius, from pervius “allowing things to pass through”, from per “through” + via “way”
im·per·vi·ous adjectiveadj
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