The term ONE HALF OF THE MCDONALD'S LOGO can be solved by the four letter word ARCH. The McDonald's logo is an iconic symbol of the fast food chain, featuring two golden arches that form an 'M'. The two arches are often referred to as the 'Golden Arches' and represent the company's name. The term ONE HALF OF THE MCDONALD'S LOGO refers to one of the two arches, which can be represented by the word ARCH.