Group (U V W Y Z) - Spelling Practices

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(1) a. Syn. subterranean; buried(地下的,地面下的) under the level of the ground; buried
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(2) n. (失业) not having a job; condition of being unemployed; state of being unused
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(3) a. Syn. improbable(不一定的,未必有的) improbable; has little chance of being the case or coming about
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(4) a. Syn. unprincipled; immoral(肆无忌惮的,无道德原则的) unprincipled; lacking honesty
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(5) v. Syn. support; preserve; maintain(维护,支持) support; preserve; hold aloft; raise
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(6) n. (活门,阀) device or structure for controlling the flow of a fluid 
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(7) n. Syn. immensity(巨大) unusual largeness in size or extent
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(8) a. (有效的,实质的,虚的) existing or resulting in essence or effect though not in actual fact; existing in mind, especially as a product of imagination
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(9) n. (病毒) disease communicator; something that poisons one's soul or mind; program for unwanted actions in computer
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(10) n. Syn. strike(罢工) strike; act of leaving or quitting a meeting, company, or organization, especially as a sign of protest