lair

US /ler/
UK /ler/
"lair" picture
1.

a wild animal's resting place, especially one that is well-hidden

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The bear retreated to its lair for the winter.
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We discovered a fox's lair near the riverbank.
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denburrownestholeretreat
2.

a secret or private place in which a person seeks concealment or seclusion

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The villain's secret lair was hidden deep within the mountains.
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He retreated to his private lair to work on his novel.
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hideoutdenretreatsanctuaryhaven