Noctilucent
Emitting light in the night, often used to describe certain high-altitude clouds.
Evanescent
Fleeting or vanishing quickly, like vapor.
Pyrrhic
Describing a victory achieved at such a great cost that it is tantamount to defeat.
Lambent
Softly glowing or flickering, like the light of a candle.
Quiddity
The inherent nature or essence of something; a distinctive feature.
Amaranthine
Undying or unfading, often used poetically to describe eternal beauty or love.
Ineluctable
Unable to be resisted or avoided; inevitable.
Zephyr
A gentle, soft breeze, often from the west.
Crepuscular
Relating to twilight or active during twilight.
Malapert
Boldly disrespectful or impudent.