membrane
膜 centers on a thin, flexible layer that covers or separates: a membrane. It is used for biological membranes and thin films.
膜 combines the flesh radical ⺼ with 莫, which likely contributes the sound マク. The character originally referred to a thin layer of tissue or film.
The flesh radical ⺼ suggests something bodily, and 莫 looks like a thin layer stretched over a frame. Picture a thin membrane covering flesh.
For マク, imagine a thin membrane stretched over a drum, making a 'maku' sound when tapped: maku -> マク.
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membrane; film
retina
mucous membrane; mucosa
cornea
eardrum; tympanic membrane
conjunctivitis
diaphragm
thin film
film; membrane
arachnoid mater; arachnoid membrane
coating; film; membrane
peritoneum
peritonitis
conjunctiva
periosteum
oil film; oil slick
valve (of the heart and the veins)
reverse osmosis membrane; reverse osmotic membrane
subarachnoid hemorrhage; subarachnoid haemorrhage; SAH
subarachnoid space