The company has stayed silent on the layoff rumors.
Tips
history
From Liu Xiang's Han-dynasty 《说苑·敬慎》: Confucius visits the Zhou temple and sees a bronze statue with its mouth sealed three times, inscribed with a warning about the dangers of careless speech — hence 三缄其口.
usage
Almost always 对 + topic + 三缄其口. Negative-to-neutral tone — the subject is being evasive or deliberately silent. Don't use for someone who is simply shy or taciturn.