Definition of see something through in English:

see something through

Persist with an undertaking until it is completed.
More example sentences
  • Dutiful as ever, he will remain at Carlton until January to see the deal through.
  • We're going to accept the risks, and we're going to see it through until the job is done.
  • But the Dumbarton MSP will probably have to stay in place to see the campaign through.
Synonyms
bring to completion, continue to the end, bring to a finish;
persevere with, persist with, continue (with), carry on with, go on with, keep at, keep on with, keep going with, keep up, not give up with, follow through, press on/ahead with, plod on through, plough on through, stay with;
informal plug away at, peg away at, stick at, soldier on with, stick something out, stick to one's guns, hang in there
See parent entry: see

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