4000 Duolingo Vocabulary List

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v. 過小 make too low an estimate of the quantity; undervalue

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v. 弱体化させる weaken by wearing away base or foundation; injure or impair; dig a mine or tunnel beneath

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a. 未踏 not discovered or explored, in any sense

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n. 宇宙 cosmos; everything that exists anywhere

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a. 有効 logically convincing; sound; legally acceptable

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n. 水蒸気 gas; steam; barely visible or cloudy diffused matter, such as mist or smoke

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n. 空 emptiness; containing nothing; clear or empty a place

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a. 侵襲 tending to vary often or widely, as in price; inconstant or fickle; tending to violence

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n. 火山 fissure in the earth's crust through which molten lava and gases erupt

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v. 賃金 hazard on the event of a contest; stake; engage in, as a contest; venture for hire or reward; employ