Here are the matched definitions for each word:
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using color, line, and shape to express an idea or feeling rather than a realistic image - Abstract Art
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having no definite form or distinct shape - Amorphous
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useless; no chance of being successful - Futile
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a quality that attracts by seeming to promise some kind of reward - Appeal
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having a desire to harm someone; mean-spirited - Malicious
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intensity of action or effect - Vigor
If you have specific words you need to match with these definitions instead, please provide them, and I can help refine the answers!