impermanent
Definitions
Not lasting for a long period of time; temporary.
Subject to change or decay; not permanent.
Examples
The beauty of the cherry blossoms is beautiful but ultimately impermanent.
He realized that his feelings of anger were merely impermanent states of mind.
Synonyms
transient temporary fleeting ephemeral momentary passing short-lived
Antonyms
permanent enduring everlasting eternal perpetual lasting constant