fleeting

Fleeting is an adjective that describes something lasting for a very short time or passing quickly. It is commonly used for moments, feelings, opportunities, or phenomena that do not endure. In everyday language, it often conveys a sense of impermanence and transience, as in a fleeting moment, a fleeting glance, or the fleeting beauty of a sunset.

Etymology and nuance: The term comes from fleet, meaning swift or rapid, and the -ing form has grown to describe things characterized by rapid passage. In usage, fleeting is typically about short duration rather than ultimate permanence. It is closely related to but distinct from ephemeral (brief and inherently fragile), transitory and transient (temporary in duration), momentary (lasting for a moment), and evanescent (quickly fading from perception).

Usage and tone: Fleeting can be neutral or carry a wistful or reflective tone, depending on context. It appears in literature, journalism, and everyday speech. Examples include a fleeting smile, a fleeting opportunity, or the fleeting nature of youth.