| cruel | (adjective) (of persons or their actions) able or disposed to inflict pain or suffering | Synonyms: barbarous, brutal, fell, roughshod, savage, vicious |
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| duel | (noun) a prearranged fight with deadly weapons by two people (accompanied by seconds) in order to settle a quarrel over a point of honor | Synonyms: affaire d'honneur |
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| (noun) any struggle between two skillful opponents (individuals or groups) | - |
| (verb) fight a duel, as over one's honor or a woman | - |
| fuel | (noun) a substance that can be consumed to produce energy | - |
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| (verb) stimulate | - |
| (verb) provide with a combustible substance that provides energy | - |
| (verb) provide with fuel | Synonyms: fire |
| (verb) take in fuel, as of a ship | - |
| gruel | (noun) a thin porridge (usually oatmeal or cornmeal) | - |
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| parimutuel | (noun) betting where winners share the total amount wagered | - |
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| refuel | (verb) take on more fuel, as of a plane, ship, or car | - |
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| (verb) provide with additional fuel, as of aircraft, ships, and cars | - |
| sequel | (noun) a part added to a book or play that continues and extends it | Synonyms: continuation |
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| (noun) something that follows something else | Synonyms: subsequence |