The term 'cargo hold' refers to the storage area of a ship or aircraft, where goods and materials are kept. It is also known as a 'BAY, ' which is a three-letter word that can be used to solve the crossword puzzle. The cargo hold is typically located below the main deck of a ship, and is designed to store large amounts of cargo securely. It is also used to store hazardous materials, such as fuel and chemicals, in order to prevent them from coming into contact with passengers or crew.