The quality or state of being fleeting, temporary, or lasting only briefly.
From 'fugacious' plus the noun-forming suffix '-ness.' Traces back through Old French to Latin 'fugacious,' all connected to the concept of fleeing or passing quickly.
This abstract noun captures one of humans' deepest anxieties: the relentless passage of time and how quickly beautiful moments disappear—philosophers love this word for discussions about impermanence.
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