家喻戶曉

Simplified: 家喻户晓

On the HSK 7-9 vocabulary list, at CEFR level C2.

jiāxiǎo ㄐㄧㄚ ㄩˋ ㄏㄨˋ ㄒㄧㄠˇ

    • understood by everyone (idiom) well known
    • a household name

Character by character

Sources