carry through

persist in an activity, follow through with an activity until it is finished

Verb
1. put in effect; "carry out a task"; "execute the decision of the people"; "He actioned the operation"
(synonym) accomplish, execute, carry out, action, fulfill, fulfil
(hypernym) complete, finish
(hyponym) get over
(verb-group) follow through, follow up, follow out, carry out, implement, put through, go through
2. bring into safety; "We pulled through most of the victims of the bomb attack"
(synonym) save, pull through, bring through
(hyponym) rescue, deliver

put into action The steel company carried through their plan to restructure all of their operations.

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To be halfway and still give up.
Said of a person that lacks constancy of purpose to carry a job through to the end.

Synonyms and related words:
abide, abide by, adhere to, administer, be patient, be responsible for, bear with composure, bring about, bring off, bring to effect, bring to pass, carry into effect, carry into execution, carry off, carry on, carry out, come through, come through with, complete, conduct, deal with, direct, discharge, do, drive, effect, effectuate, endure, enforce, execute, exhaust every move, face out, fill out, follow out, follow through, follow up, forbear, fulfill, get through, go all out, go for broke, go the limit, go through, handle, honor, implement, last, make, make go, make out, manage, maneuver, manipulate, not hesitate, not look back, observe, operate, overlook nothing, perdure, perform, perform on, persist, pilot, play, practice, promulgate, prosecute, pull off, put across, put in force, put in practice, put into effect, put into practice, put over, put through, render, run, see it through, see out, see to, steer, stick at nothing, stop at nothing, take care of, think little of, think nothing of, transact, translate into action, wait, wait it out, work, work out,