natural indigo; true indigo dye
Refers to indigo dye made from the indigo plant (タデアイ) using traditional fermentation methods, as opposed to synthetic indigo.
This kimono is dyed with natural indigo.
Compound of 本 (ほん, 'true' or 'genuine') and 藍 (あい, 'indigo'), distinguishing natural plant-based indigo from synthetic or imitation dyes.