flattery, insincerity
侫 centers on dishonest, self-serving speech: flattery and insincerity used to manipulate others.
侫 is a variant form of 佞. It combines 亻 (person) with 妄, which likely contributes both sound and the idea of reckless or improper behavior, suggesting a person who speaks falsely.
A person 亻 who speaks with reckless disregard for truth 妄 is using flattery and insincerity to get their way.
For ネイ, picture a flatterer saying 'Nay, nay!' insincerely while nodding along: 'nay' -> ネイ, and the person's false agreement is pure flattery.