prickly heat powder; baby powder; talc powder
A traditional Japanese product name for a powder used to prevent or treat prickly heat and skin irritation, especially for babies. Often refers to a specific brand or type of medicated talcum powder.
In summer, I dust prickly heat powder on my neck and back.
I use baby powder when changing the baby's diaper.
Compound of 汗 (ase, 'sweat') and 知らず (shirazu, 'not knowing'), literally 'sweat-ignorant', referring to a powder that keeps sweat and prickly heat at bay. The exact origin as a product name is uncertain.