何をか言わんやだよ.
What can I say about it?
There is no way of expressing it―It is unspeakable―unutterable.
(文頭に置けば)―There is no saying―(文尾に置けば)―for aught one knows―(独立句に用いれば)―Who knows?―God knows―(形容詞に用いれば)―unspeakable sorrow―inexpressible feeling―indescribable beauty―unutterable grief―ineffable joy―indefinable charm―exquisite pleasure
What are you insinuating?
What are you implying?
There is no saying what may happen.
I just don't know what to say.
What are you implying?
What the hell are you talking about?
何とも言えないな。
I can't say for sure.