Roget's Thesaurus: Entry 447 (Invisibility)

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#447. Invisibility. -- N. invisibility, invisibleness, nonappearance, imperceptibility; indistinctness &c. adj.; mystery, delitescence[obs].

concealment &c. 528; latency &c. 526.

V. be invisible &c. adj.; be hidden &c. (hide) 528; lurk &c. (lie hidden) 526; escape notice.

render invisible &c. adj.; conceal &c. 528; put out of sight.

not see &c. (be blind) 442; lose sight of.

Adj. invisible, imperceptible; undiscernible[obs], indiscernible; unapparent, non-apparent; out of sight, not in sight; a perte de vue[French]; behind the scenes, behind the curtain; viewless, sightless; inconspicuous, unconspicuous[obs]; unseen &c. (see see &c. 441); covert &c. (latent) 526; eclipsed, under an eclipse.

dim &c. (faint) 422; mysterious, dark, obscure, confused; indistinct, indistinguishable; shadowy, indefinite, undefined; ill-defined, ill-marked; blurred, fuzzy, out of focus; misty &c. (opaque) 426; delitescent[obs].

hidden, obscured, covered, veiled (concealed) 528.

Phr. " full many a flower is born to blush unseen " [Gray].