counter for spiciness
Colloquial counter used for the spiciness level of food, especially curry. Often used with numbers like 一辛, 二辛, etc.
This curry is about a spiciness level of five.
You can choose from spiciness level one to ten.
辛 (かのと) is the eighth of the ten celestial stems used in calendars and fortune-telling, while 辛い (からい) is the common adjective meaning "spicy/harsh" written with the same kanji.
Derived from the adjective 辛い (からい, 'spicy'), used as a counter in casual contexts.