And then he merely grunted acknowledgment in an absent sort of way.

The big man merely grunted, for he could not think of any suitable reply.

The old man merely grunted at this statement of the obvious.

Without turning to look at his brother, the young cub merely grunted.

Cash merely grunted and wrestled his way out the window.

The giant merely grunted, and then threw his victim across the room.

Vincent merely grunted and slid out of the car to follow her inside.

He merely grunted, but I took it as permission to speak.

The old man merely grunted again, but made no further reply.

I merely grunted, hoping he would continue filling the silence.