1) The cat began to mutter to itself while kneading on the blanket.

2) I could hear my dad muttering under his breath as he worked on fixing the car.

3) Despite the loud music, I could still hear my sister muttering about her bad day.

4) The old man would often mutter incoherently, lost in his own thoughts.

5) It's easier to mutter complaints than to voice them out loud.

6) The students began to mutter amongst themselves about the difficult test.

7) The politician was caught on camera muttering something offensive about his opponent.

8) I caught a snippet of the conversation, and all I could make out was the woman muttering about the weather.

9) The ghostly figure seemed to mutter eerie words as it floated through the abandoned house.

10) As the storm raged outside, the villagers huddled together, muttering prayers for safety.