verb / noun
flutter
FLUT-er/ˈflʌtər/
A rapid, light, irregular beating motion.
The light silk ribbon flutters in the breeze beside the twig.

Etymology
Floterian was a repeated-action form of the verb meaning “float.” Its uses for birds and things tossed by waves connect floating to and fro with today's quick, irregular motion.
In context
many other butterflies dance and flutter all around the butterfly children stop to rest on the soft white flowers
More examples
- The bird takes off with a flutter of wings.
- Her eyelids fluttered as she began to wake.
- The curtains are fluttering beside the open window.
Forms
flutter · flutters · fluttered · fluttering