The term 'THIEVES' HIDEOUT' can be broken down into two words, 'DEN' and 'LAIR'. A DEN is a small, hidden shelter or refuge, often used by animals. It can also be used to describe a place where criminals hide out. A LAIR is a more secure and hidden place, usually associated with wild animals. In this context, it can also refer to a secret hideout for criminals. Therefore, the term 'THIEVES' HIDEOUT' can be used to describe a secret place where criminals go to hide from the law.