Imperceptible(ADJ)

Difficult to perceive by the sense; barely noticeable

Synonyms

Small

Tiny

Unnoticeable


Antonyms

Obvious

Seeable

Noticeable


Sentences

Her dancing was incredibly light; she looked like some exotic poppy swaying to an imperceptible breeze.

Again Barbara gave him that imperceptible and flattering touch.

Imperceptible Electronics (Someya-Sekitani Group, University of Tokyo)