adverb
properly; in a good manner; sophisticatedly; seemly; in a dignified way
Describes acting or behaving with refinement, dignity, and good manners. Often used for speech, dress, or conduct.
彼女はいつも品良く振る舞う。
She always behaves in a refined manner.
品良く断るのは難しい。
It's difficult to decline gracefully.
上品に is more common and directly means 'elegantly' or 'refinedly', while 品良く is slightly less frequent but carries a similar nuance of dignified propriety.
Compound of 品 (ひん, 'elegance, dignity') and 良く (よく, adverbial form of 良い, 'good'). The exact historical derivation is uncertain, but the spelling conventionally associates with refined behavior.