go through fire
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go through fire and water
To face many challenges in the process of doing or accomplishing something. I feel like we had to go through fire and water to get here, since all of our flights were either delayed or canceled.
go through fire (and water)face any peril.
This phrase originally referred to the medieval practice of trial by ordeal, which could take the form of making an accused person hold or walk on red-hot iron or of throwing them into water.