Difficult GRE Words - Group 1

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n. repudiation; self-sacrifice; renouncing your own interests in favor of interests of others

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n. an old saying, that has obtained credit by long use

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v. make impure by adding inferior or tainted substances

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a. easily approachable; warmly friendly

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v. comment; make explanatory notes

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a. deviating from normal or common order, form, or rule

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v. inform; give notice to; make aware

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n. underground bed or layer yielding ground water for wells and springs etc

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n. person with power to decide a dispute; judge

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a. tree-dwelling; treelike; living in trees