den
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noun
a wild animal's lair or habitation.
(動物の住む)穴(lair)
informal a small, comfortable room in a house where a person can pursue an activity in private.
｟主に米｠ 居間; ｟英･やや古･くだけて｠ (奥まった静かで快適な)私室 (!特に男性の書斎･仕事部屋など)
a place where people meet in secret, typically to engage in some illicit activity:
(盗賊などの)巣窟, 隠れ場所; むさ苦しい部屋
e.g. an opium den
e.g. a den of iniquity.
chiefly US a small subdivision of a Cub Scout pack.
(カブスカウト(Cub Scouts)の)分隊
verb (dens, denning, denned) no object
(of a wild animal) live in or retreat to a den:
e.g. the cubs denned in the late autumn.
ORIGIN
Old English denn, of Germanic origin; related to German Tenne ‘threshing floor’, also to dene1.