无庸

wú yōng duō shuō

无庸多说

need scarcely say

wú yōng chén mò

无庸沉默。

There is no need for reticence.

wú yōng zhēng lùn

无庸争论。

There is no need to argue.

wú yōng zhì yí

无庸置疑

admit of no doubt