Evanescent (adjective)

Tending to disappear or fade quickly, especially like a vapor.

Origin:

From the latin word "evanescens" meaning "fading away".

Examples:

1. The evanescent fragrance of roses filled the air.
2. The memory of their first kiss was evanescent and soon forgotten.
3. The beauty of the sunset was evanescent, lasting only for a few minutes.
4. The evanescent nature of the phenomenon made it difficult to study.
5. The evanescent success didn't last long and soon faded away.