Grumble
Definition 1 of 3
Pro Tip 1/3
Subtle discontent
Used to indicate a mild or repressed annoyance without confrontation. She grumbled about the cold office but didn't request a heater.
Pro Tip 2/3
Not Directly
Expressing complaints indirectly, without addressing someone specifically. Walking away from the meeting, Jonah grumbled about the decision.
Pro Tip 3/3
Low Volume
Grumbling is not loud; it's quiet and may not be fully audible to others. He grumbled to himself about the homework load.