Imperceptible

1.

(Very slight, gradual, etc) អសញ្ញានីយ (ដែលមិនអាចចាប់យក ដោយវិញ្ញាណបាន) / អសញ្ញានីយ (ដែលតូចពេក, ដែលតិចពេក, ដែលមិនអាចចាប់យកដោយវិញ្ញាណបាន)
Example: An almost imperceptible sound.

2.

(FIGURATIVE) ដែលស្ដួចស្ដើងពេក, អវេទយត័, ស្ដួចស្ដើងណាស់
Example: An imperceptible change in temperature.

1.

Not perceptible; not to be apprehended or cognized by the souses; not discernible by the mind; not easily apprehended.

1.

ambiguous, blurred, cryptic, dim, esoteric, inaudible, indistinct, indistinguishable, invisible, obscure, shadowy, indiscernible, unseen

1.

evident, perceptible, seen, visible