Cabal usually implies secretive and dishonest activities, often with a negative outcome. The company's downfall was attributed to a cabal of corrupt executives.
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Historical Reference
Originally, 'Cabal' referred to a specific group of ministers to Charles II, now used more generally. The novel featured a historical cabal manipulating the royal succession.
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Clique Versus Cabal
A 'cabal' is like a clique but usually involved in political or power-seeking activities. Unlike the socialite's clique, the minister's cabal had a definite political agenda.