momentariness

enUK

mo·men·tar·y

M0378300 (mō′mən-tĕr′ē)adj.1. Lasting for only a moment.2. Occurring or present at every moment: in momentary fear of being exposed.3. Short-lived or ephemeral, as a life.
[Middle English momentare, from Latin mōmentārius, from mōmentum, moment; see moment.]
mo′men·tar′i·ness n.