This is the 18641st most frequent Korean word.
신년사를
"신년사" means "New Year's address" or "New Year's speech."
In this sentence, "신년사를" is used in its base nominative form to represent an official speech delivered at the start of the year.
대통령이 신년사를 발표했다.
The president delivered a New Year's speech.
Here, "신년사를" indicates the direct object, referring to the speech that was heard and impacted the listener.
나는 대통령의 신년사를 다 듣고 감명을 받았다.
I listened to the president's New Year's speech and was impressed.
The word "신년사를" in this context shows the act of preparing a speech specifically associated with the New Year.