Plainly
look up a word, understand it — no rabbit hole
ephemeral
nouneh-FEM-uh-ruhl
meaning in plain English
A thing that lasts only a short time.
Think a snowflake on a warm hand — it’s there, then gone; that’s ephemeral.
for example
The sunrise was an ephemeral, disappearing within minutes.
Imagine a soap bubble that pops as soon as you blow it; that bubble is an example of something ephemeral, because it doesn't stay around for long.