SubterraneanRefers to something or someone existing under the earth's surface.
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Existing, occurring, or done under the earth's surface."They discovered a subterranean bunker."
CavernA natural underground room or passage often used to denote hidden or mysterious instances in the Earth’s interior.
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A cave, or a chamber in a cave, typically a large one."They explored the vast, dark cavern."
SavageOften used to describe the primitive nature of beings in the Earth’s core.
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A person regarded as primitive or uncivilized."The book portrays the inhabitants of the Earth's core as savages."
Fierce, violent, and uncontrolled."The protagonist had to endure savage conditions."
ImprisonmentDescribing the state of being confined, typically pertaining to the protagonist’s predicament.
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The state of being imprisoned; captivity."The protagonist faced a long period of imprisonment."
ExploitOften used to describe the protagonist’s acts of bravery or achieving feats in challenging situations.
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A bold or daring feat."They marveled at his exploits in the subterranean realm."
To make use of (a situation) in a way considered unfair or underhanded."He had to exploit the situation to improve his odds of survival."
PrimitiveDescribes the uncivilized and underdeveloped state of the beings and societies in the Earth’s core.
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Relating to, denoting, or preserving the character of an early stage in the evolutionary or historical development of something."The protagonist encountered a primitive society in the Earth's core."
InhabitantsRefers to the beings living in the Earth’s core.
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A person or animal that lives in or occupies a place."The subterranean inhabitants had strange customs."
PredatorRefers to the dangerous creatures that prey on other beings inside the Earth’s core.
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An animal that preys on others."The protagonist had to defend himself against several subterranean predators."
EscapeOften pertains to the protagonist’s ultimate goal of leaving the Earth’s interior.
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Break free from confinement or control."The protagonist's mission was to escape from the Earth's core."
SurvivalUsed extensively to describe the protagonist’s struggle and primary goal in the adverse conditions.
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The state or fact of continuing to live or exist, typically in spite of an ordeal."Survival in the Earth's core was a daily struggle."