老化 lǎo huà 🔊 to age HSK 7–9 + Review this word Meanings lǎo huà (of a person, population or material) to age(of knowledge) to become outdated Its characters 老lǎoprefix used before the surname of a…HSK 3化huàto make intoHSK 5 Words with 老化 适老化 shì lǎo huà to make (products, living spaces etc)…