英和和英

I can't tell.

I am not certain [sure].

I can't say for certain.

to be unable to speak

I can't say for sure.

You know what it is.

It goes without saying.

I cannot say.

I can't say.

That's hard to say.

Save your breath.

I have nothing left to say except 〜.

I do not [don't] see.

I just don't know what to say.

I cannot say that.

I must not say that.

I cannot talk.

I can only say that.

I couldn't say no.

I don't know what to say.

I'm at a loss for words.

Not knowing, I cannot say.

I told you so!

I cannot say what I want to say.

I'm not going to tell you.

I will not say it.

I can't say anything.

What can I say about it?

I have nothing to say about it.

It should be left unsaid.

to be unable to speak

I can not say for certain.

I don't have a say.

I'm sorry but I'm unable to disclose that information to you.

I can't say.

I can't say anything to that.

I'm afraid I'm unable to say anything in regards to that.

I'm not telling you.

My lips are sealed.

I can't release that information.

I can't tell.

Can't say anything

impossible to hear

not impossibly

I can not speak for astonishment―（他動詞構文にすれば）―Astonishment deprives me of my power of speech.

not knowable

It gives unspeakable pleasure.

I wouldn't mind.

I don't care.

I don't mind.

See if I care!

No worries.

I can't say for certain.

not likely to be rewarded

I could not speak

Can't take it

if I am not mistaken

Can't see

isn't

without knowing it