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adjective

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operational - Something that is in working order and ready for use.

SpaceX is looking forward to the day that a community on Mars becomes fully operational.

adjective

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sweeping - Extensive or wide-ranging in effect or scope, having a major impact; far-reaching or thorough.

The politician promised sweeping reforms if elected.

adjective

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impregnable - Unable to be broken into or captured.

The high walls around the city made it impregnable when attacked or under siege.

noun

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manifesto - A public declaration of intent, policy, aims, opinions, and objectives.

The political party got together to write a manifesto that explained their vision for the future, and the path to get there.

adjective

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surefire - Guaranteed to produce a desired result.

His latest song is a surefire hit—everyone is talking about it.