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Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means coloring so the verb vocab version is to color something, because you're doing coloring.
You go to color something, painting the coloring all over the wall. Problem is, the coloring is made of ACID. This causes the wall to erode (いろど).
環境に優しいアイテムに切り替えることは、あなたの暮らしを彩ります。
Switching to environmentally friendly items would color your life.
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