muttered
verbUK /ˈmʌt.əd/
US /ˈmʌt̬.ɚd/
Spoke very quietly so it was hard to hear.
He muttered a quick apology and hurried away.
OTHER MEANINGS
2. Spoke in a low, angry voice that was hard to understand.
She muttered under her breath about the long wait.
3. Made a low, rumbling sound like distant thunder.
The old engine muttered as it started up.
4. Said something quietly to oneself, often in complaint.
He muttered to himself while searching for his keys.