Colloquial emphatic expression meaning 'very' or 'indeed' (often as 'sore ya' or 'sore yaa' in speech).
そりゃあ無理だよ、その値段じゃ買えない。
That's impossible — you can't buy it at that price.
それはそれはありがたいお話です。
That's truly kind of you / I'm very grateful.
そりゃ、驚いただろうね。
Well, you must have been surprised.
A discourse marker meaning 'that (thing/point)' used to refer to a previously mentioned topic or to introduce an explanation.
それは明日の会議の件です。
That refers to the matter for tomorrow's meeting.
それは、つまり彼の責任ということだ。
That is, in other words, it's his responsibility.
それはどういう意味ですか？
What do you mean by that?