den
noun
the lair or shelter of a wild animal, especially a predatory mammal.
Used to describe an ongoing action or continuous state that was happening at a specific time in the past.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Her locations on both April 24 and May 2 were within 250 yards of each other, which might indicate that she was denning.
From Ecological Studies of the Timber Wolf in Northeastern Minnesota by L. D. Frenzel