ah, ok – AOB got it!
e?phem?er?al
? ?/??f?m?r?l/ Show Spelled Pronunciation [i-fem-er-uhl] Show IPA
1. lasting a very short time; short-lived; transitory: the ephemeral joys of childhood.
2. lasting but one day: an ephemeral flower.
3. anything short-lived, as certain insects.