The term 'Scots Dagger' refers to a type of dagger originating in Scotland. It is also known as a DIRK, which is a four-letter word that is one of the solutions to this crossword. The Scots Dagger is a long, double-edged knife with a hilt and a blade that is usually between 8 and 14 inches long. It was traditionally used by Scottish Highlanders as a weapon for close combat and as a utility tool.