GRE Word List

OBSIDIAN

a dark natural glass formed by the cooling of molten lava

The meaning of the word obsidian is a dark natural glass formed by the cooling of molten lava.

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WordMeaning
attritionsorrow for one's sins that arises from a motive other than that of the love of God
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engageto offer (something, such as one's life or word) as backing to a cause or aim : to expose to risk for the attainment or support of some end
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