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

• decipher
• decipherabilities
• decipherability
• decipherable
• deciphered
• decipherer
• decipherers
• deciphering
• decipherment
• decipherments
• deciphers
• decision
• decisions
• decision support system
• decision support systems
• decision table
• decision tables
• decision theory
• decisive
• decisively
• decisiveness
• decisivenesses
• decisory
• decistere
• decisteres