It is not worth mentioning specially.
It is not particularly worth mentioning.
Do not say such blackguard things.
expressing something in an indirect manner
I don't know what excuse to make
There is nothing in particular that I would like to say.
There is no way of expressing it―It is unspeakable―unutterable.
I don't think that's an exaggeration.
言うまでもないことだ
I do not know what excuse to make.
You mustn't grumble.
(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
I have nothing particular to say.
I have nothing more to say.