silent as the grave
Saying absolutely nothing (especially about a particular subject).
The investigation is ongoing, but all the suspects have been silent as the grave so far.
adj
Free from sound or noise; absolutely still; perfectly quiet.
How silent is this town!
What was formerly performed by fleets and armies, by invasions, sieges, and battles, has been of late accomplished by more silent methods.
Not speaking; indisposed to talk; speechless; mute; taciturn; not loquacious; not talkative.
Ulysses, adds he, was the most eloquent and most silent of men.
This new-created world, whereof in hell / Fame is not silent.
Keeping at rest; inactive; calm; undisturbed.
The winds were silent, all the waves asleep, / And heaven was trac'd upon the flattering deep
Not pronounced; having no sound; quiescent.
The e is silent in fable.
Silent letters can make some words difficult to spell.
Having no effect; not operating; inefficient.
Cause […] silent, virtueless, and dead.
noun
That which is silent; a time of silence.
Deep night, dark night, the silent of the night.
A silent movie
More than 40 films will be shown spanning the past seventy-five years, including early silents and talkies, contemporary productions, foreign and American films, documentaries, underground works and television shows.
noun
Acronym of syndrome of irreversible lithium-effectuated neurotoxicity.