Aguinaldo is a fascinating word that refers to a Christmas bonus or a gift, often given during the holiday season. While it literally means a holiday bonus, it can also refer to a Christmas carol or a gift given during the holidays.
In this song, the lyrics say, "Recíbelo bien, Que éste es tu aguinaldo" (Receive it well, for this is your gift). Here, it's used to describe the bouquet of beautiful flowers being offered as a special gift, making it a unique and culturally rich word to learn.