Antonyms of adj imperceptible

1 sense of imperceptible

Sense 1
imperceptible (vs. perceptible), unperceivable -- (impossible or difficult to perceive by the mind or senses; "an imperceptible drop in temperature"; "an imperceptible nod"; "color is unperceivable to the touch")

perceptible (vs. imperceptible) -- (capable of being perceived by the mind or senses; "a perceptible limp"; "easily perceptible sounds"; "perceptible changes in behavior")
        => detectable, noticeable -- (capable of being detected; "after a noticeable pause the lecturer continued")
        => discernible -- (capable of being perceived clearly; "an essay with a meaning that was not always discernible")
        => faint, weak -- (deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc; "a faint outline"; "the wan sun cast faint shadows"; "the faint light of a distant candle"; "weak colors"; "a faint hissing sound"; "a faint aroma"; "a weak pulse")
        => palpable -- (can be felt by palpation; "a palpable tumor")
        => perceivable -- (capable of being perceived especially by sight or hearing; "perceivable through the mist")
        => recognizable -- (easily perceived; easy to become aware of; "this situation produces recognizable stress symptoms")
        => sensible -- (readily perceived by the senses; "the sensible universe"; "a sensible odor")

Similarity of adj imperceptible

1 sense of imperceptible

Sense 1
imperceptible (vs. perceptible), unperceivable -- (impossible or difficult to perceive by the mind or senses; "an imperceptible drop in temperature"; "an imperceptible nod"; "color is unperceivable to the touch")
       => impalpable -- (not perceptible to the touch; "an impalpable pulse")
       => incognizable, incognoscible -- (incapable of being perceived or known)
       => indiscernible, insensible, undetectable -- (barely able to be perceived; "the transition was almost indiscernible"; "an almost insensible change")
       => subliminal -- (below the threshold of conscious perception)
       => unobservable -- (not accessible to direct observation)
          Also See-> impalpable#2; inaudible#1, unhearable#1; invisible#1, unseeable#1