This is the 9125th most frequent Japanese word.
無下
"無下" (muge) means "utterly disregarding" or "treating something with complete rejection or without value."
Here, the term 無下 (muka) is used to express the dismissal or disregard for something, in this case, the advice.
彼は私の助言を無下に扱った。
He treated my advice dismissively.
In this sentence, 無下 (muka) is used as an adjective describing an attitude that is dismissive or inconsiderate.
無下な態度を取るべきではない。
One shouldn't adopt a dismissive attitude.
Here, 無下 (muka) implies straightforward or outright dismissal of the offer, suggesting not to disregard it entirely.