UKwidespread in other English varietiesproverbialidiomatic
A proverb advising that the less one speaks about a sensitive or unpleasant matter, the more quickly the situation will be repaired, forgotten, or cause no further trouble.
2.
UKwidespread in other English varietiesidiomaticinformal
A recommendation to avoid discussion that might inflame or prolong an argument; remaining silent prevents escalation or further harm.