The word "蘑菇" is formed by combining two characters, each containing the grass radical "艹" to semantically indicate a plant-based category. The character "蘑" incorporates "磨" primarily as a phonetic component to suggest the sound "mo", while "菇" uses "姑" as a phonetic component for the sound "gu", together creating the disyllabic term for mushroom through their shared semantic radical and complementary phonetic cues.