The term 'DIAGONAL NAUTICAL POLE' is composed of three words: 'DIAGONAL, ' 'NAUTICAL, ' and 'POLE.' The first word, 'DIAGONAL, ' refers to a line that runs from one corner of a shape to another. The second word, 'NAUTICAL, ' refers to the sea or ocean, and the third word, 'POLE, ' refers to an upright support. When combined, the term 'DIAGONAL NAUTICAL POLE' refers to a POLE that is placed diagonally in the sea or ocean. The crossword solution for this term is 'SPRIT, ' which is a type of POLE used on sailing vessels to support the mainsail. It is usually placed at the bow of the boat and is used to help the boat move forward.