transience
noun
[ ˈtranzɪəns ]
• the state or fact of lasting only for a short time; transitoriness.
• "the transience of life and happiness"
Similar:
temporariness,
transitoriness,
impermanence,
brevity,
briefness,
shortness,
ephemerality,
short-livedness,
momentariness,
mutability,
instability,
volatility,
evanescence,
caducity,
fugitiveness,
