transient (part of speech: adjective)
flickering, passing, temporary, short-lived, transitory, fleeting, evanescent, mortal, temporal, brief, transient, impermanent, mutable, flitting, cursory, restless, fading, short-term, momentary, fickle, instantaneous, volatile, ephemeral, changeable, shifting
- He fell before a better general, and his rootless system died at once, leaving not a trace behind it. - "Rulers of India: Akbar", George Bruce Malleson.
- Poe's magical creations were rootless flowers. - "Brief History of English and American Literature", Henry A. Beers.
- Bel liked her own life here, so far; it was pleasanter than that which she had left; but she began to see how hundreds of other girls were going on in it without reward or hope; unfitting themselves, many of them utterly, by the very mode of their careless, rootless existence,- all of them, more or less, by the narrow specialty of their monotonous drudgery,- for the bright, capable, adaptive many- sidedness of a happy woman's living in the love and use and beauty of home. - "The Other Girls", Mrs. A. D. T. Whitney.