den¹ /den/

1. The hollow lair of a wild animal
2. A pit or cave
3. A haunt of vice or misery
4. A private domestic room or office for work or pleasure (informal)
5. A Cub Scout group (US)
6. A narrow valley, a dean (Scot)

To retire to a den

den mother noun (US)

1. An adult female leader of a Cub Scout group
2. Any adult female protective figure in general

• keep it dark
• keep it real
• keepnet
• keepnets
• keep off
• keep on
• keep on about
• keep on at
• keep one'an eye on
• keep one's bed
• keep one's breath to cool one's porridge
• keep one's cards close to one's chest
• keep one's chin up
• keep one's cool
• keep one's countenance
• keep one's distance
• keep one's ear to the ground
• keep oneself to oneself
• keep one's end up
• keep one's eye in
• keep one's eye on
• keep one's eyes peeled
• keep one's eyes skinned
• keep one's finger on the pulse
• keep one's fingers crossed