noun
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the quality of being swift, vehement or forceful.
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the quality characterised by action, motion, energetic work, willing participation, etc.
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skill in performing, getting something done, deceiving, etc.; craftiness; skill; trick.
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great ability or proficiency; expertness that comes from training, practice, etc.; skill.
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the quality of being sharp, keen or pointed; sharpness.
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the quality of moving, doing rapidly; swiftness; quick motion.
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a sign, mark or symbol.
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something that helps to solve a problem, find something, etc.; a clue.