Imperceptible means something that cannot be perceived, detected or noticed by someone through their senses. It is a term used to describe something so small, subtle or gradual that it goes unnoticed.
Usage examples
The changes in the painting were so subtle and imperceptible that only an expert would notice.
The sound of his footsteps was nearly imperceptible, as he moved across the room with utmost care.
Over time, the erosion of the rocks was so gradual and imperceptible that it transformed the entire landscape.
The medication had an imperceptible effect on reducing her pain, leaving her frustrated and seeking alternative treatments.
The artist skillfully blended colors in such a way that the transitions were imperceptible, creating a harmonious masterpiece.
The spider's movements were so quick and imperceptible that its prey never even saw it coming.
With age, his hearing loss became imperceptible at first, but as time went on, he realized he was missing more and more conversations.
The changes in his behavior were so subtle and imperceptible that his friends didn't notice anything was wrong until it was too late.
MOCA Cleveland's presentation of Becoming Imperceptible is organized by Senior Curator Andria Hickey. (mocacleveland.org)
The Torsen and traction control are also nearly imperceptible in their operation. (fourwheeler.com)
In turn, the painted block at the bottom, almost imperceptible in white hues, suggests a reference to earth, the real, the concrete, and the tangible. (mendeswooddm.com)