fǔ is archaic. It names one of the Twelve Ornaments embroidered on imperial ceremonial robes: an axe motif in alternating black and white, symbolising the sovereign's power to decide and to execute justice. The compound
黼黻 names the axe-pattern plus its
弓-shaped partner together — the two most senior of the Twelve Ornaments — and by extension came to mean 'magnificently ornamented'. The famous Tang phrase
黼黻文章 (literally 'ornament-pattern composition') praised splendid literary prose.