| 1. | An almost imperceptible flush crossed M. - from Les Miserables by Victor Hugo |
| 2. | Madeleine made an imperceptible movement. - from Les Miserables by Victor Hugo |
| 3. | There were sudden creaks of the furniture, imperceptible rustlings in the curtains. - from The Secret Adversary by Agatha Christie |
| 4. | In one of these was a small and almost imperceptible chink through which the eye could just penetrate. - from Frankenstein by Mary Wollstonecraft (Godwin) Shelley |
| 5. | Every flight should be an imperceptible slipping away. - from Les Miserables by Victor Hugo |
| 6. | By this time his pulse was imperceptible and his breathing was stertorous, and at intervals of half a minute. - from The Works of Edgar Allan Poe by Edgar Allan Poe |
| 7. | With him, as with Aldrich, art was a matter of exquisite touches, of infinite compression, of almost imperceptible shadings. - from The Best American Humorous Short Stories by Various |
| 8. | From where he sat he made an imperceptible sign to the tavern-keeper. - from Les Miserables by Victor Hugo |
| 9. | These facts, significant but unknown, were imperceptible on the surface. - from Les Miserables by Victor Hugo |