amaranthine

Example:Her appearance was ephemeral, like the morning dew on a blade of grass.

Definition:Existing for a very short time; fleeting.

Example:The mood of the city was so volatile, no one knew what would happen next.

Definition:Prone to sudden and dramatic change; subject to quick change under ordinary conditions of temperature and pressure.

Example:The sound of her laughter was transient, soon replaced by the gentle breeze.

Definition:Short-lived; passing or likely to pass quickly; temporary.