Transitory (adjective)

1. Lasting only a short time; temporary.
2. Not permanent or long-lasting.

Origin:

Early 16th century: from latin 'transitorius' meaning 'fleeting, brief'.

Examples:

1. The effects of the medicine were transitory, fading after a few hours.
2. She enjoyed the transitory beauty of the cherry blossoms, knowing they would soon be gone.
3. The transitory nature of the job made it difficult for him to plan for the future.
4. The transitory success of the company was built on a foundation of unsound business practices.
5. The transitory popularity of the trend was easily forgotten as the next big thing came along.