The term 'Pattern DIAMOND' is a combination of two words, 'ARGYLE' and 'DIAMOND'. ARGYLE is a type of pattern consisting of diamonds, or rhombuses, of different colors arranged in a repeating pattern. It is most commonly seen on socks, sweaters, and other clothing items. The DIAMOND part of the term refers to the shape of the pattern, which is made up of DIAMOND-shaped elements. The combination of these two words creates a unique pattern that is both visually appealing and stylish.