The word "粗糙" is formed by combining two characters, each with the radical "米" (rice), indicating a relation to grain or texture. "粗" uses "且" as a phonetic component and denotes coarseness, while "糙" uses "造" as a phonetic component and denotes roughness. Together, they create a compound word meaning rough or coarse, emphasizing the semantic connection through the shared radical and the phonetic hints in each character.