Group (1) - Spelling Practices

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(1) faster rate of improvement; rate of change of velocity with respect to time
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(2) bitterness of speech and temper; sourness or acidness of taste, character, or tone
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(3) slightly sour in taste or in manner; sharp; caustic
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(4) unpleasantly sharp or bitter to taste or smell; bitterly pungent
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(5) something added on or attached generally nonessential or inferior
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(6) appeal to or entreat earnestly; command or enjoin solemnly, as under oath
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(7) fondness; tender feeling toward another; fondness
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(8) mentally quick; moving quickly and lightly
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(9) elevation especially above sea level; height
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(10) cut off part of body, especially by surgery; prune