The word 深度 is formed by combining two characters: 深 (shēn), which means "deep", and 度 (dù), which means "degree" or "extent". Conceptually, these elements merge to express the abstract notion of "the quality or state of being deep". It is not merely a physical measurement but a fusion where the core idea of "deep" is given a dimensional or measurable aspect by "degree", resulting in the comprehensive concept of "depth".