go through with

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go through with (something)

To do something that one has planned or promised, in spite of difficulties, hesitations, or concerns about the outcome. Are you sure you want to go through with this? If the investment doesn't pan out, you could lose everything. She still went through with her decision to start her own business, even though it meant sacrificing her lucrative career. I love James, but I don't want to get married. I don't think I can go through with it.
See also: go, through

go through with something

to complete something the outcome of which is troubling or doubtful; to do something in spite of problems and drawbacks. I have to go through with it, no matter what. I just couldn't go through with it.
See also: go, through