Mutter

Three hours later, the King was loitering around the castle, looking for something to busy himself with. "Fuck, I'm so bored," he grumbled in exasperation. "The kids are at school. Gwo's at work. Impa's at the hospital. Ganon—" Suddenly the King heard an incomprehensible cry and turned around to see Fari rush past him. "Damn, Fari, what was that?!" "Piss off, Your Majesty!" Fari yelled at the top of his lungs. "My... PMSing as usual, I see," the King continued to mutter dejectedly. "Shit, I'm so fucking bored. Nothing good on TV. Nothing good online. Nothing good to eat." As he was about to leave the dining hall, his eyes were drawn to a cinnamon jar standing lonely on the table. A spoon of cinnamon was placed conveniently next to it. In a saner state the King may have been reasonably suspicious about it, but now he was so exhausted from boredom that any opportunity to relieve it for a minute felt like a blessing. "I wonder what ground cinnamon tastes like," said he nonchalantly and put the spoon in his mouth.

Source: tatoeba (3939800)

She was often observed to raise her hands to her neck, as if in search of the ribbon that had been taken from it, and mutter, in surprise and discontent, when she could not find it, “It was the link that bound me to life.”

Source: tatoeba (7760800)

For he hath heard your murmuring against the Lord: but as for us, what are we, that you mutter against us?

Source: tatoeba (8063176)

Don't mutter to yourself under your breath, but speak clearly and distinctly.

Source: tatoeba (10177322)