>Evanescent \ev-un-NESS-unt\ (adjective)

MSWORD’s definition: disappearing after only a short time and soon forgotten: fleeting
M-W’s Word Central: tending to vanish like a vapor: not lasting

In the presence of so many frat boys, the evanescent beer supply had to be replenished several times.

Her so-called love was evanescent and broke many hearts.

The evanescent nature of the specter made it difficult for Sally to capture it’s likeness in her painting.

I like the the sound of this word and the effortless way it flows, almost as if it’s unstoppable once you begin the first syllable. How about you?