frills is a form of:

Frill



noun
1.
(fluted strip of fabric or paper gathered at one edge, a fringe, a ruffle, excessive ornament) lace frill ជរដាក់ជាយ, useless frill គ្រឿងក្រៅពីត្រូវការ
ENGLISH MEANING
noun
1.
A similar ruffle around the legs or other appendages of animals.
2.
A ruffled varex or fold on certain shells.
3.
A border or edging secured at one edge and left free at the other, usually fluted or crimped like a very narrow flounce.
4.
A ruffing of a bird's feathers from cold.
5.
A ruffle, consisting of a fold of membrane, of hairs, or of feathers, around the neck of an animal.
verb
1.
(INTRANSITIVE) To shake or shiver as with cold; as, the hawk frills.
2.
(INTRANSITIVE) To wrinkle; -- said of the gelatin film.
3.
(TRANSITIVE) To provide or decorate with a frill or frills; to turn back. in crimped plaits; as, to frill a cap.