暗

Mahjong

declaring a concealed kong; forming a concealed four-of-a-kind

underdrainage

sad thought; depressing reflection

crypto-assets; cryptocurrency assets

cryptography; cryptographic theory

Computing

encryption technology

scent of a flower floating about in the air; lingering scent of a flower in the darkness

gathering dark clouds; being under the shadow of

secret language; code word; argot

secretly; covertly; tacitly

dark figure (esp. of crime); dark number; hidden figure; difference between the actual and reported figure

undercurrent

to be shrouded by darkness

to fall into deep sadness or despair

dark hole

idiot; fool

Historical term; Abbreviation

road taken by a Chinese ajari buddhist monk when he incurred the wrath of emperor Genso (685-762)

Physics

dark current

suggestive therapy

cryptography

cryptography; cryptographic technique

encryption; coding; password

to shed silent tears

Physics

dark line (in a spectrum); absorption line

understood subject

giving an amorous sidelong look; casting an amorous glance (at); playing up to someone behind the scenes

darkness; gloom