frill
n.
"wavy ornamental edging," 1801 (with a doubtful attestation from 1590s), of uncertain origin despite much speculation [see OED]; figurative sense of "useless ornament" first recorded 1893. Related: Frills.
v.
"to furnish with a frill," 1570s, from frill, n. "ornamental bordering." Related: Frilled.