imperceptible
imperceptible, unnoticeable
adjective eem-pehr-sep-TEE-bleh Rare
Usage Note
Imperceptible describes something so slight or subtle that it cannot be detected by the senses or mind. It is an invariable adjective — the same form serves both masculine and feminine: cambio imperceptible, diferencia imperceptible. The adverb form is imperceptiblemente. The antonym is perceptible. It is often used in scientific or literary registers to describe extremely small changes.
Examples
"Hubo un cambio imperceptible en su expresión."
Natural Translation
There was an imperceptible change in his expression.
Related Words
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