imperceptible |
imperceptive |
As adjectives the difference between imperceptible and imperceptive
is that
imperceptible is not perceptible, not detectable, too small in magnitude to be observed while
imperceptive is unable to perceive.
imperceptive |
undercreep |
As an adjective imperceptive
is unable to perceive.
As a verb undercreep is
(obsolete) to creep secretly or imperceptively.