fugacious
Fleeting, fading quickly, transient.
Restless, shifting, fugacious as time itself is a certain vast bulk of the population of the red brick district of the lower West Side. Homeless, they have a hundred homes.
Where it comes from
Borrowed from Latin fugācius (whence -acious), comparative of fugāciter (“evasively, fleetingly”), from fugāx (“transitory, fleeting”), from fugiō (“to flee”).
Adapted from the Wiktionary entry fugacious (CC BY-SA 4.0).