Difficult IELTS Words - Group 4

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n. effort or attempt; exertion of physical or mental powers toward the attainment of object

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v. insert in a roil; register or enter in list or catalogue; insert in records; enlist

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v. to enclose completely as if with a covering

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n. any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions

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n. outbreak of a contagious disease that spreads rapidly and widely

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n. mental or emotional balance; state of balance of any causes, powers, or motives

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v. get rid of completely

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v. empty or remove the contents of; withdraw or depart from

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a. easily seen or understood; obvious; apparent; clear

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n. slender, elongated, threadlike object or structure