follow-through
US /ˈfɑː.loʊ.θruː/
UK /ˈfɑː.loʊ.θruː/

1.
the act of continuing a plan or action to its completion
:
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His project lacked proper follow-through, so it was never completed.
•
She has great ideas, but her follow-through is often weak.
2.
the part of a stroke in sports (such as golf or tennis) that occurs after the ball has been hit
:
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A good golf swing requires a smooth follow-through.
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Her tennis serve had a powerful follow-through.