flicker

flicker verb [ I ] uk/ˈflɪkər/ us flicker verb [I]
(APPEAR)

to appear for a short time or make a sudden movement somewhere

мелькать
A smile flicker ed across her face.

FLICKER noun

[ no plural ] uk/ˈflɪkər/ us flicker noun [no plural]
(EMOTION)

a slight, brief feeling or expression of an emotion

вспышка, проблеск
a flicker of hope