noun
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.
夏は汗知らずを首や背中にはたく。
In summer, I dust prickly heat powder on my neck and back.
赤ちゃんのおむつ替えのときに汗知らずを使う。
I use baby powder when changing the baby's diaper.