Difficult GRE Words - Group 12

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a. related to spring; suggestive of youth; vigorous and fresh

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n. animals having a bony or cartilaginous skeleton with a segmented spinal column

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n. vitality and energy; healthy capacity for vigorous activity

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v. clear from blame; exonerate; maintain, uphold, or defend

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a. spread by word of mouth, with minimal intervention in order to create buzz and interest; caused by a virus

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n. resistance of a liquid to shear forces; physics coefficient of viscosity; quality of flowing slowly

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a. ravenous; excessively greedy and grasping; devouring or craving food in great quantities

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v. decrease in size or strength; draw gradually to an end

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n. any of many types of stinging flying insect

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n. one who wastes, especially one who wastes money; idler or loafer