讳莫如深[huì mò rú shēn]
词典carefully conceal [avoid] mentioning (scandal)
词典closely guard a secret：讳莫如深。
词典keep sth. dark：秘而不宣；讳莫如深。
词典have a great aversion to ...：讳莫如深。
讳莫如深[huì mò rú shēn]
（紧紧隐瞒） carefully conceal [avoid] mentioning (scandal); closely guard a secret; keep sth. dark; have a great aversion to ...; not to breathe a word to a soul; not to utter a single word about ...
1. closely guard a secret：close texture 质地致密 | closely guard a secret 讳莫如深 | Clothes make the man. 人靠衣装.
2. very cagey with sth：vertically challenged 个子矮的 | very cagey with sth 讳莫如深 | very nice 太美了