mumble
🇺🇸
/ˈmʌmbl/
🇬🇧
/ˈmʌmbl/
to speak quietly and unclearly
He tends to mumble when he is nervous, making it hard to understand him.
他紧张时说话总是含糊不清,让人难以理解。
quiet, unclear speech
Her mumble was so soft that no one could catch what she said.
她的喃喃自语太轻了,没人能听清她说了什么。