(n.) The act or state of vanishing away; disappearance; as, the evanescence of vapor, of a dream, of earthly plants or hopes.

KO agnosia amnesia anoxia asteroids aurora particles bamboo curtain barrier of secrecy blocking brownout catalepsy catatonia catatony censorship coma cosmic particles cosmic ray bombardment curtain dematerialization departure dimout disappearance disappearing dispersion dissipation dissolution dissolving eclipse elimination erasure evanescence evaporation extinction fadeaway fadeout fading faint fugue going grayout hush-up intergalactic matter iron curtain ironbound security kayo knockout lipothymia lipothymy loss of memory melting meteor dust impacts meteors nirvana nirvana principle nothingness oath of secrecy oblivion obliviousness occultation official secrecy pall passing pressure suit radiation repression seal of secrecy security semiconsciousness senselessness sleep smothering space bullets stifling stupor suppression swoon syncope the bends unconsciousness vanishing vanishing point veil veil of secrecy weightlessness wipe word deafness wraps