毒 (Kanji for poison/ addict)

Onyomi

DOKU

My mom claims she is a master of cooking, but I'm always telling her, "DON'T COOK with poison!"

中毒(ちゅうどく)	addict ★★★☆☆ 中 (middle) + 毒 (poison/ addict) = 中毒 (addict)
毒舌(どくぜつ)	sharp-tongued ★☆☆☆☆ 毒 (poison/ addict) + 舌 (tongue) = 毒舌 (sharp-tongued) 'poison tongue' - in English, we'd say a sharp tongue
有毒(ゆうどく) な	toxic, poisonous ★☆☆☆☆ 有 (exist) + 毒 (poison/ addict) = 有毒 (toxic, poisonous)
毒薬(どくやく) する	poison ☆☆☆☆☆ 毒 (poison/ addict) + 薬 (medicine) = 毒薬 (poison) regular ,intentional poison- as opposed to toxic pollutants or drugs.

	Meaning	Hint	Radical
毒	poison/ addict	EVERY	毎
害	damage	MOUTH	口

Sugar damages your mouth, but the addict eats it EVERY day.