I couldn't understand what he said because all he did was mumble and mutter.
mumble
She tended to mumble when she was nervous, making it hard to understand her.
I am not writing a sentence using that word.
I can give you a sentence using the word galaxy.
a sentence using the word endotracheal
This is a sentence using the word aviator.
I am saying a sentence using the word collagen.
This is a sentence using the word monomer. :P
this is a sentence using the word armchair.
Since the dentist was working on my teeth, I could only mumble my reply to his questions.
Need a sentence using the word crater?
Please type a sentence using the word assertion.