言いにくいのですが
It's hard to say, but...
言いにくいことだが
being hesitant to say something
言いにくいな。
言いにくいです。
言いががり
the characteristic of being accustomed to saying something
It is an unanswerable question.
of one's manner of speaking, the condition of being obstinate and unyielding
それは言いにくいな。
That's hard to say.
I find it hard to say when I am not drunk.
It gives unspeakable pleasure.
to say everything―leave nothing unsaid
言い損いだ
It was a slip of the tongue―a lapse of the tongue.
I can't say for certain.