evanescent
adjective
[ ɛvəˈnɛs(ə)nt ]
• soon passing out of sight, memory, or existence; quickly fading or disappearing.
• "the evanescent Arctic summer"
Similar:
vanishing,
fading,
evaporating,
melting away,
disappearing,
diminishing,
dwindling,
shrinking,
fugitive,
fugacious,
ephemeral,
fleeting,
short-lived,
short-term,
passing,
transitory,
transient,
momentary,
temporary,
brief,
here today and gone tomorrow,
• denoting a field or wave which extends into a region where it cannot propagate and whose amplitude therefore decreases with distance.
Origin:
early 18th century (in the sense ‘almost imperceptible’): from Latin evanescent- ‘disappearing’, from the verb evanescere (see evanesce).