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The character "蓑" is structured with the grass radical "艹" positioned above the component "衰", which functions as its phonetic element, forming a pictophonetic character that originally designated a raincoat crafted from grass or straw. Its etymology directly associates it with the concept of this protective garment, and the character's composition has continually reflected this meaning through its semantic and phonetic parts. The meaning of "蓑" has primarily centered on this raincoat, with its use in classical texts retaining this reference without substantial semantic shift.