This accounts for the lifeless, muted tone of his paintings.

He spoke in a voice pitched low, its tone dull and lifeless.

Even the silence had a hollow tone, barren and lifeless.

The flat, lifeless tones of the other were not raised.

Then his voice returned to its usual cold, lifeless tone.

"No, he's raised a wing to shield," Sean said, again using that almost lifeless tone.

"But that I can never do," she replied, falling into a weary, lifeless tone.

With a dull, almost lifeless tone to her voice, and an air of being repulsed by his physical closeness.

It made her shudder to think that husband and wife would speak to each other in such lifeless tones.

The proposal started off, it must be said, in decidedly lifeless tones as regards an objective analysis; then the tone improved along the way.