Literature Reference: 有声真汉相，无颣胜隋珠。—— 《奉和吏部杨尚书太常李卿二相公策免后即事述怀赠答十韵》 Possessing a true voice of the Han Prime Minister, flawlessness surpasses the Sui pearl. Source from 'Fenghe Libu Yang Shangshu Taichang Li Qing Er Xianggong Cemian Hou Ji Shi Shu Huai Zeng Da Shi Yun'.
无: No, it's clean, won't happen.
颣: Shortcomings, flaws. Obscure characters, use with caution.
Meaning: Flawless and perfect, without any blemish.