一声不响

to keep totally silent / noiselessly

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

first tone in Mandarin (high, level tone)

sound / voice / tone / noise / reputation / classifier for sounds

no; not so / (bound form) not; un-

echo / sound / noise / to make a sound / to sound / to ring / loud / classifier for noises