noun / verb
frill
FRILL/frɪl/
An ornamental edging added beyond what is necessary.
A frill of feathers and ribbons decorates the pencil's upper end.

Etymology
A frill was an ornamental edging on clothing. That decorative role gave rise to the figurative sense of an embellishment or extra that is not essential.
In context
… the gorgeous little frill detail around the hemline and the Frills around the sleeve …
More examples
- The hotel offers clean rooms without any expensive frills.
- He considers heated seats an unnecessary frill.
- She frills the cuffs with strips of gathered cotton.
Forms
frill · frills · frilled · frilling
frilly adjective — Decorated with gathered or ruffled edges.