imperceptible

He could feel the imperceptible changes taking place within him.

A few more imperceptible steps lead us, finally, to the result.

"Do feel right at home," David was saying, with an almost imperceptible break in his voice.

Something, almost imperceptible, yet very obvious had come over him.

They were almost imperceptible, as though put there by someone who knew he was watched.

He said nothing, but smiled again in that almost imperceptible way.

The movement was so slow as to be almost imperceptible.

An almost imperceptible sound came from the black man's throat.

And he did not hear his voice; that, too, was imperceptible.

By imperceptible degrees, he had become known among the people.

I caught the almost imperceptible movement and turned to look at him instead of the window.

The nod she gave was imperceptible to anyone but him.

The fine was more like an imperceptible shake of the head.

Both men nodded with an almost imperceptible movement of the head.

Her nose was tiny almost to the point of being imperceptible.

With an almost imperceptible movement of her mouth, she said, "Thank you."

The gesture was almost imperceptible, but she had seen it.

David caught an almost imperceptible nod as Miles made his decision.

If they are making any progress at all it is totally imperceptible.

In this case the error will be imperceptible to the human eye.

But I was brought to it by slow, and almost imperceptible degrees.

A slow, almost imperceptible evolution is already taking place in the high street.

He replied with an almost imperceptible shake of his head.

His nod would have been imperceptible to anyone who was not waiting for it.

It is in fact almost imperceptible, except when great periods of time are involved.