taboo name; name of deceased

euphemism; word used to avoid a taboo reference

to avoid stating openly (esp. sensitive or unpleasant matters, usu. in the negative, as in 不諱言|不讳言[bu4 hui4 yan2] "to state frankly")

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

(idiom) to steadfastly refuse to discuss the matter; to treat it as an untouchable subject