the.com/evanescence

means The quality of fading away or disappearing gradually, like something too delicate to last.

from From Latin evanescere, 'to vanish, die away' — built from ex- ('out, away') and vanescere ('to vanish'), itself rooted in vanus, meaning 'empty' or 'vain.' The same vanus gives us 'vanish' and 'vain,' so evanescence shares a root with the idea of emptiness — things that fade are, at bottom, things that were always a little hollow at the center.