mumble
US /ˈmʌm.bəl/
UK /ˈmʌm.bəl/

動詞
1.
つぶやく
to speak quietly and in a way that is not clear so that the words are difficult to understand:
例:
•
She mumbled something about being too busy.
Lingolandでこの単語を学ぶ

つぶやく
to speak quietly and in a way that is not clear so that the words are difficult to understand: