The term 'DHOW's Sail' refers to a type of triangular sail used on traditional Arab sailing vessels known as dhows. The sail is also known as a LATEEN sail, which is a six-letter word that can be found in crossword puzzles. The LATEEN sail is characterized by its long yardarm and triangular shape, which allows it to catch the wind more effectively than other types of sails. This makes it ideal for sailing in shallow waters and in strong winds.