water pepper vinegar; vinegar infused with water pepper leaves
A traditional Japanese condiment made by infusing vinegar with water pepper (蓼) leaves. Often served with salt-grilled sweetfish (鮎の塩焼き).
Water pepper vinegar goes well with salt-grilled sweetfish.
This water pepper vinegar is homemade, made by steeping water pepper leaves in vinegar.
Compound of 蓼 (tade, 'water pepper') and 酢 (su, 'vinegar'). The reading ず is a rendaku form of 酢.