dark; gloomy; depressed; dispirited; dark (in colour); dull; ill-boding
total darkness; pitch dark; bleak future; poor prospects
implicitly; indirectly; tacitly; by implication; obscurely
memorization; memorisation; learning by heart
secret manoeuvres (maneuvers); operating behind the scenes
suspicion will raise bogies; once you suspect something, everything else will look suspicious; jumping at shadows
(theatrical) blackout; taking a (sudden) turn for the worse; rapid deterioration
shady; underhanded; questionable
tacit understanding; unspoken agreement
tacit; unspoken; implicit
dark clouds; threatening signs; ominous indications
pitch dark; total darkness
dark; gloomy; somber; depressing
dark-natured; gloomy; dour; moody; insular; glum
to lose hope; to be plunged into darkness
dark side (of nature, town, etc.)
personal identification number; PIN; password number
encryption; encipherment; password protection
recitation; reciting from memory
light and darkness; light and shade
total darkness; pitch dark; bleak future; poor prospects
thoughtless; reckless; rash; excessive; unreasonable; immoderate
total darkness; pitch dark; bleak future; poor prospects
autosuggestion; self-suggestion
rote memorization (memorisation); rote learning; indiscriminate memorizing (memorising)
to be dazzled by; to be dizzied by; to be lost in (greed, lust, etc.); (arch.) to become dark
imbecility; feeblemindedness; dark
secret feud; wordless pantomime performed in the dark (in kabuki)
recitation; reciting from memory
it is darkest under the lamp post; it's hard to see what is under your nose; go abroad to hear of home; you must go into the country to hear what news at London
the dark side; the seamy side
to run aground; to strike a rock; to be stranded on a reef; to reach a deadlock; to come to a standstill; to run into difficulties
to feel gloomy; to feel blue; to feel melancholy
reef; sunken rock; unforeseen difficulty
dark; gloomy; black; doleful; discouraged; disappointed
dark clouds gather; threatening signs emerge; trouble is afoot
Dark Continent (i.e. Africa)
to decide the outcome (e.g. game); to be very different; to be sharply contrasted
semi-darkness; dim light; poor light; dusk; twilight
it is darkest under the lamp post; it's hard to see what is under your nose; go abroad to hear of home; you must go into the country to hear what news at London
groping in the dark; exploring new avenues without having any clues
subterranean drain; culvert; conduit
dark place; unlit spot; darkness
night-vision scope; night scope
dark clouds gather; threatening signs emerge; trouble is afoot
pitch dark; total darkness
memorization power; ability to remember; (good) memory
shady; underhanded; questionable
memorizing a musical score
stupid; half-witted; dull-witted; blockhead; idiot; dimwit
eclipse period (in viral lifecycle); eclipse phase; dark age
cryptographic key; encryption key
to feel gloomy; to feel blue; to feel melancholy
secretly; covertly; tacitly
nyctophobia; fear of the dark; scotophobia
gloom; darkness; seclusion
assassination of U.S. President John F. Kennedy (November 22, 1963); JFK assassination
a work or subject to be memorized (memorised)
four concealed triplets (yakuman); four concealed three-of-a-kinds
dark; gloomy; somber; depressing
camera obscura; black box
butoh; style of contemporary Japanese dance featuring dancers in white paint
secretly; covertly; tacitly
encryption key; cryptographic key
tacit knowledge (knowledge management terminology)
to conceal (oneself); to hide; to abscond; to deceive; to dissemble; to fool
cryptography; encryption technology
to disappear; to vanish; to abscond; to decamp
subterranean drain; culvert; conduit
encrypted mail; cyphermail
dark; gloomy; somber; depressing
cryptographic system; cryptosystem
behind-the-scenes maneuvering; behind-the-scenes manoeuvering; secret maneuvers; secret manoeuvres
dead of night; shades of night; black of night
groping in the dark; exploring new avenues without having any clues
beautiful scenery of spring; red-light district
concealed pung; concealed three-of-a-kind
declaring a concealed kong; forming a concealed four-of-a-kind
to disappear; to vanish; to bolt; to go into hiding
suspicion begets monsters
sad thought; depressing reflection
cryptography; cryptographic theory
crypto-assets; cryptocurrency assets
it's always darkest before the dawn; the darkest hour is just before the dawn
scent of a flower floating about in the air; lingering scent of a flower in the darkness
personal identification number; PIN; password number
assassination of U.S. President John F. Kennedy (November 22, 1963); JFK assassination
shadow cast by a person's hand
to get dark; to grow dark; to end (of a day, year, season, etc.); to come to an end; to be sunk in (e.g. despair); to be lost in (e.g. thought)
gathering dark clouds; being under the shadow of
secretly; covertly; tacitly
secret language; code word; argot
dizziness (from standing up too fast); orthostatic syncope; lightheadedness; vertigo
rote memorization (memorisation); rote learning; indiscriminate memorizing (memorising)
symmetric key cryptography
secret key cryptography; symmetric key cryptography
dark figure (esp. of crime); dark number; hidden figure; difference between the actual and reported figure
to be shrouded by darkness; to fall into deep sadness or despair
dizziness (from standing up too fast); orthostatic syncope; lightheadedness; vertigo
secretly; covertly; tacitly
secretly; covertly; tacitly
to weep bitterly; to suddenly grow dark
to weep bitterly; to suddenly grow dark
camera obscura; black box
thoughtlessly; recklessly; rashly; excessively; unreasonably; immoderately
to disappear; to vanish; to bolt; to go into hiding
road taken by a Chinese ajari buddhist monk when he incurred the wrath of emperor Genso (685-762)
secretly; covertly; tacitly
dark hole; idiot; fool; historical road
(clandestine) brothel (Edo period); whorehouse
cryptography; cryptographic technique
encryption; coding; password
indiscriminate learning by heart
giving an amorous sidelong look; casting an amorous glance (at); playing up to someone behind the scenes
(both) the bright and dark sides
Data Encryption Standard; DES
link-by-link encipherment
cryptographic synchronization
implicit scope terminator
implicit link (process definition)
implicit link (process definition)
conventional cryptosystem
conventional cryptosystem
body part encryption indication
Great Dark Spot (on Neptune)
darkness under the trees; dark place under the trees
shade under a tree in full leaf; summer
shade under a tree in full leaf; summer
pairing-based cryptography
concealed pung; concealed three-of-a-kind
prostitute working in clandestine brothel (Edo period)
prostitute; imposter; fraudster; trickster
to drive black hogs in the dark; to be unable to distinguish one thing from another; (lit.) to come out from the darkness with a cow
subterranean drain; culvert; conduit
symmetric key cryptography
symmetric key cryptography
scotopic vision; twilight vision