In the following sentence as an example : "he sweated it out until the lab report was back", What does "it" refer to in "sweated it out"?
I have just seen the example "if it wasn't for Amber.." which looks like "Without Amber .." English is a foreign language for me and I have no problem understanding Amber's example. The example"I lost it" could be understood as I lost control or composer. In the same way how could I understand the sentence in my question which sounds very alien to me as a french and Arabic speaker. I'm interested in the etymology or grammar of it, or in which way could it be transformed.