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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
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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