| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | unable to be seen; hidden |
| Synonyms: | concealed, covert, deceptive, disguised, ethereal, gaseous, ghostly, ideal, impalpable, imperceptible, imponderable, inappreciable, inconspicuous, indiscernible, infinitesimal, insensible, intangible, masked, microscopic, not in sight, obliterated, obscured, occult, out of sight, perdu, screened, supernatural, ulterior, unapparent, undisclosed, ungraspable, unnoticeable, unobservable, unperceivable, unreal, unseeable, unseen, unviewable, vaporous, veiled, wraithlike |
| Antonyms: | detectable, obvious, seen, visible |
| Main Entry: | hidden |
| Part of Speech: | adjective |
| Definition: | unseen, secret |
| Synonyms: | QT, abstruse, buried, clandestine, cloaked, close, clouded, concealed, covered, covert, cryptic, dark, disguised, eclipsed, esoteric, hermetic, hermetical, imperceivable, in the dark, indiscernible, invisible, latent, masked, mysterious, mystic, mystical, obscure, occult, out of view, private, recondite, screened, secluded, sequestered, shadowy, shrouded, surreptitious, ulterior, undercover, underground, undetected, undisclosed, unexposed, unknown, unrevealed, veiled, withheld |
| Antonyms: | bare, exhibited, exposed, open, out, seen, showing, uncovered |
| Main Entry: | imperceptible |
| Part of Speech: | adjective |
| Definition: | hard to sense; faint |
| Synonyms: | ephemeral, evanescent, fine, gradual, impalpable, imponderable, inappreciable, inaudible, inconsiderable, inconspicuous, indiscernible, indistinct, indistinguishable, infinitesimal, insensible, insignificant, invisible, microscopic, minute, momentary, shadowy, slight, small, subtle, tiny, trivial, undetectable, unnoticeable, vague |
| Antonyms: | apparent, conspicuous, distinct, evident, noticeable, obvious, perceptible, seeable, striking, unobscured |
| Main Entry: | intangible |
| Part of Speech: | adjective |
| Definition: | indefinite, obscured |
| Synonyms: | abstract, abstruse, airy, dim, eluding, elusive, ethereal, evading, evanescent, evasive, hypothetical, impalpable, imperceptible, imponderable, inappreciable, incorporeal, indeterminate, insensible, invisible, rare, shadowy, slender, slight, unapparent, uncertain, unobservable, unreal, unsubstantial, unsure, vague |
| Antonyms: | definite, obvious, palpable, perceptible, tangible |
| Main Entry: | latent |
| Part of Speech: | adjective |
| Definition: | dormant, hidden |
| Synonyms: | abeyant, between the lines, concealed, contained, covert, idle, immature, implied, in abeyance, inactive, inert, inferential, inferred, inherent, inoperative, intrinsic, invisible, involved, lurking, passive, possible, potential, quiescent, rudimentary, secret, sleeping, smoldering, suppressed, suspended, tacit, torpid, underdeveloped, underlying, undeveloped, unexposed, unexpressed, unrealized, unripe, unseen, veiled, vestigial |
| Antonyms: | active, apparent, clear, live, manifest, obvious, open, public |
| Main Entry: | lost |
| Part of Speech: | adjective |
| Definition: | missing, off-track |
| Synonyms: | absent, adrift, astray, at sea, cast away, disappeared, disoriented, down the drain, fallen between cracks, forfeit, forfeited, gone, gone astray, hidden, invisible, irrecoverable, irretrievable, irrevocable, kiss goodbye, lacking, minus, mislaid, misplaced, missed, nowhere to be found, obscured, off-course, out the window, strayed, unredeemed, vanished, wandering, wayward, without |
| Antonyms: | accomplishing, found, successful, winning |
| Main Entry: | microscopic |
| Part of Speech: | adjective |
| Definition: | tiny, almost undetectable |
| Synonyms: | atomic, diminutive, imperceptible, infinitesimal, invisible, little, minuscule, minute, negligible, teeny, wee |
| Antonyms: | big, huge, large, macroscopic |
| Main Entry: | minute |
| Part of Speech: | adjective |
| Definition: | very small |
| Synonyms: | atomic, diminutive, exact, exiguous, fine, inconsiderable, infinitesimal, insignificant, invisible, little, microbic, microscopic, miniature, minim, minimal, minuscule, molecular, peewee, piddling, precise, puny, slender, teeny-weeny, tiny, wee |
| Antonyms: | big, giant, gigantic, huge, large, mighty |
| Main Entry: | obscure |
| Part of Speech: | adjective |
| Definition: | out-of-the-way, little-known |
| Synonyms: | abstruse, arcane, blind, cabalistic, close, covered, cryptic, dark, deep, devious, distant, enigmatic, esoteric, far, far-off, hidden, humble, inaccessible, inconspicuous, inglorious, invisible, irrelevant, lonesome, lowly, minor, mysterious, nameless, odd, oracular, orphic, rare, recondite, remote, removed, reticent, retired, secluded, secret, secretive, seldom seen, sequestered, solitary, undisclosed, undistinguished, unheard-of, unhonored, unimportant, unknown, unnoted, unseen, unsung |
| Antonyms: | distinguished, famous, known |