Group (U V W Y Z) - Spelling Practices

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(1) a. Syn. supersonic(ультразвуковой) supersonic; higher in frequency than the range of sound perceptible to the human ear
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(2) v. Syn. weaken(подорвать) weaken by wearing away base or foundation; injure or impair; dig a mine or tunnel beneath
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(3) ad. Syn. unluckily(К сожалению) unluckily; by bad luck
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(4) n. Syn. speech(высказывания) vocal expression; power of speaking; last or utmost extremity
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(5) n. (вакуум) empty area or space; electrical home appliance that cleans by suction
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(6) n. (клапана) device or structure for controlling the flow of a fluid 
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(7) a. Syn. defective; imperfect(порочный) by vice or defects; defective; imperfect; having the nature of vice; evil, immoral, or depraved
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(8) n. (Вайн) weak-stemmed plant that derives support from climbing
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(9) n. (Вирус) disease communicator; something that poisons one's soul or mind; program for unwanted actions in computer
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(10) v. (визуализации) make visual, or visible; see in fancy; form a mental image of