fleeting
adjective /ˈfliːtɪŋ/
  /ˈfliːtɪŋ/
[usually before noun]- lasting only a short time synonym brief
- a fleeting glimpse/smile
 - a fleeting moment of happiness
 - We paid a fleeting visit to Paris.
 
Oxford Collocations DictionaryFleeting is used with these nouns:- expression
 - fame
 - glance
 - …
 
Word OriginOld English (in the sense ‘floating, swimming’): from fleet ‘move or pass quickly’ + -ing.