讳 (w)

(huì) to avoid mentioning; taboo word; name of deceased emperor or superior

讳名 (w)

(huìmíng) taboo name; name of deceased

讳疾忌医 (w)

(huìjíjìyī) hiding a sickness for fear of treatment (idiom); fig. concealing a fault to avoid criticism; to keep one's shortcomings secret; to refuse to listen to advice

讳称 (w)

(huìchēng) euphemism; word used to avoid a taboo reference

讳莫如深 (w)

(huìmòrúshēn) important matter that must be kept secret (idiom); don't breathe a word of it to anyone!