fugacious
Concise Oxford English Dictionary © 2008 Oxford University Press:
fugacious /fjʊˈgeɪʃəs/
▶adjective literary tending to disappear; fleeting.
– derivatives
fugaciously adverb,
fugaciousness noun,
fugacity noun.
fugaciously adverb,
fugaciousness noun,
fugacity noun.
'fugacious' also found in these Oxford entries:

