Как по Английски будет imperceptible

Not able to be identified as different or distinct.

Indistinguishable.

Unable to be heard.

Impossible to see or clearly distinguish.

Incapable of being perceived; = "imperceptible".

Lacking in perception; imperceptive (of something).

So slight, gradual, or subtle as not to be perceived.

Lacking in perception or insight.

Failing to perceive something.

That cannot be searched into or understood through investigation; inscrutable, mysterious.

That cannot be seen or discerned; invisible.

Not clearly expressed or easily understood; obscure, opaque; (of a speaker or writer) unclear in style, meaning, or expression. occasionally also of an object: †not transparent or translucent; compare "perspicuous" (obsolete).

That cannot be sought into, examined, or understood; uninvestigable.

(of a situation or circumstance) not able to be confronted or dealt with.

Not easily observed or noticed.

Imperceptible.

Imperceptible.

Not perceptive.

Not pierceable; impenetrable.