adjectives
perceptible by the senses or intellect
"things happen in the earth and sky with no discernible cause"; "the newspaper reports no discernible progress in the negotiations"; "the skyline is easily discernible even at a distance of several miles"
capable of being perceived clearly
"an essay with a meaning that was not always discernible"
is similar to
capable of being perceived by the mind or senses
"a perceptible limp"; "easily perceptible sounds"; "perceptible changes in behavior"
capable of being seen or noticed
"a discernible change in attitude"; "a clearly evident erasure in the manuscript"; "an observable change in behavior"