mumble

US /ˈmʌmbəl/

UK /ˈmʌmbl/

B1
n. (c./u.)Noun (Countable/Uncountable)Speech that is not clear enough or loud enough
From behind the wall, we could not hear any words, just a mumble
v.i.Intransitive VerbTo speak without being clear or loud enough
The more worried he became the more he started to mumble

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How to give the BEST speech or presentation in English

16:16How to give the BEST speech or presentation in English