expression
that far; to that extent; so much
Used to indicate a physical or metaphorical limit, often in expressions like そこまで言う (go so far as to say) or そこまでやる (go that far).
そこまで言うなら、仕方ない。
If you go that far in saying it, I have no choice.
彼がそこまでやるとは思わなかった。
I didn't think he would go that far.
interjection
stop!; that's enough!; not one step further!
Interjection used to tell someone to stop, either physically or in their speech/actions. Often carries a strong, emphatic tone.
そこまで！もうやめてくれ。
Stop! That's enough, please.
そこまで！これ以上近づくな。
Not one step further! Don't come any closer.