1. Impossible or difficult to perceive by the mind or senses
   "an imperceptible drop in temperature"; "an imperceptible nod"
   - unperceivable

See also: impalpable, imperceptibility, imperceptibly, inaudible, incognisable [Brit], incognizable, incognoscible, indiscernible, insensible, invisible, subliminal, undetectable, unhearable, unobservable, unseeable

Antonym: perceptible

• buna
• buna rubber
• bunce
• bunch
• bunch together
• bunch up
• bunchberry
• Bunche
• bunchgrass
• bunchy
• bunco
• bunco game
• buncombe
• bund
• Bundesbank
• bundh
• bundle
• bundle of His
• bundle off
• bundle up
• bundled
• bundled-up
• bundling
• bunfight
• bung