Rare, literary term for insincere, smooth-talking flattery. Often carries a negative connotation of manipulative or deceitful praise.
I was taken in by his smooth flattery and ended up signing the contract.
Characters skilled in flattery often appear in classical literature.
The historical derivation is uncertain; the spelling 佞弁 combines 佞 (flattery, insincere eloquence) and 弁 (speech).