overcoat, down feathers
氅 centers on a heavy outer garment made with feathers: an overcoat or cloak lined with down for warmth.
氅 combines 毛 (hair, feathers) with 敞, which likely contributes the sound. The character suggests a feathered garment.
The top 敞 looks like an open coat, and the bottom 毛 is fur or feathers. Imagine a wide overcoat stuffed with soft down feathers.
For ショウ, picture a showy feathered overcoat on display: show -> ショウ, and the coat is full of down.