洗い粉 あらいこ Also written 洗粉 Meanings Noun cleansing powder (e.g. for hair, skin or tableware); washing powder Kanji 洗 wash. Read as あらう. 粉 powder. Read as こ. Words containing 洗い粉 髪洗い粉 (かみあらいこ) powder for cleaning the hair Jinuma: Japanese Dictionary · Word lists