How do I say “I looked for it until I found it “ or “I looked for (something) until I found it” what is the word that i use for “until”
You should use "直到 [...為止]"
It's still correct if you omit 為止, but in this case keeping it sounds more natural to me.
"直到" has two meanings, one of which is slightly different from "until":
1. something is true before the time point, but false after it.
"Until" is this meaning. For example,
It's not available until tomorrow. 直到明天才有/能提供
I didn’t know this matter until now. 直到現在我才知道這件事
It's implied that it will be available tomorrow or after tomorrow and I know this matter now.
2. something is true before the time point, and could be also true after it.
For the second meaning:
Up to now I still remember this matter. 直到現在我仍然記得這件事
Ok, I believe these are the colloquial expressions that you are looking for:
The key word is 才, which is the closest to the English words "until" / "till".
No. 1 is perhaps the best match. "找了一找" simply means "looked for" or "searched", without any indication of time frame.