1. very slight, gradual, or subtle: the imperceptible slope of the road.
2. not perceptible; not perceived by or affecting the senses. noun
3. something not capable of being perceived by the senses: metaphysical speculation about imperceptibles.
"flickers can be imperceptible as littles."
"districts can be imperceptible to alls."
"differences can be imperceptible on alls."
"changes can be imperceptible."
"signs can be imperceptible."
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