This is the 4728th most frequent Russian word.
завершают
"Complete" or "finish."
Here, 'завершают' is used to indicate the act of completing or finishing an activity.
Они завершают свою работу перед отпуском.
They are finishing their work before vacation.
In this context, 'завершают' implies providing the finishing touch or finalizing something.
Эти украшения завершают праздничный декор.
These decorations complete the festive decor.
The word 'завершают' here denotes concluding an action, particularly related to completing a physical activity like a race.