Pronunciation: [kˈiːp mˈʌm] (IPA) 
The phrase "keep mum" means to remain silent or keep a secret. The word "mum" is spelled with the letter "m" followed by the vowel sound "ʌ" and then the consonant sound "m" again. The IPA phonetic transcription for "mum" is /mʌm/. The origin of the phrase is uncertain, but it may stem from the Old English word "mǫma," which meant silence or mutedness. Today, "keep mum" is a common idiom used in English-speaking countries.
To "keep mum" is an idiomatic expression that means to remain silent or keep quiet, often regarding a particular subject or information. This phrase is derived from the old English word "mum," meaning silent or not speaking. By "keeping mum," an individual purposely refrains from speaking about a specific matter, generally to maintain secrecy or protect sensitive information from being disclosed.
This expression can be used in various contexts. It is commonly employed when someone knows confidential or classified information and is expected to maintain strict confidentiality, refusing to discuss it with others. This can occur, for instance, in legal proceedings, where a witness is instructed to "keep mum" about a certain issue or refrain from speaking about it when questioned.
Additionally, "keeping mum" can also be used in everyday conversations, particularly when an individual is aware of a secret or sensitive topic, but chooses not to reveal it. This behavior can be seen as a sign of loyalty, trustworthiness, or discretion, as the person voluntarily withholds information that may cause harm or discomfort to others or violate someone's privacy.
In summary, "keeping mum" is an idiomatic phrase urging someone to remain silent or keep quiet about specific information or subjects in order to protect secrecy, maintain confidentiality, or show discretion.
The phrase keep mum means to remain silent or to keep something secret. The word mum originated from Middle English mum or mom, which was an onomatopoeic word that imitated the sound made with closed lips or a soft humming sound. It was used to indicate, in a playful or commanding manner, that a person should remain quiet. Over time, mum became associated with silence or secrecy, leading to the phrase keep mum.
