諱莫如深

Simplified: 讳莫如深

huìmòrúshēn ㄏㄨㄟˋ ㄇㄛˋ ㄖㄨˊ ㄕㄣ

    • to steadfastly refuse to discuss the matter to treat it as an untouchable subject

      idiom

Character by character

Sources