also: カレールウ · カレー・ルー · カレー・ルウ
curry roux
A block or powder of seasoned fat and flour used as the base for Japanese curry. Often sold in solid blocks that are dissolved in water or broth.
Dissolve the curry roux and simmer until it thickens.
You can easily make curry using store-bought curry roux.
From English 'curry' + French 'roux' (a mixture of fat and flour used as a thickener).