This is the 187th most frequent Portuguese word.
dezembro
December.
In this sentence, 'dezembro' is used as the subject of the sentence, being the noun that refers to the last month of the year.
Dezembro é um mês de festas e celebrações.
December is a month of parties and celebrations.
Here, 'dezembro' acts as the object of the preposition 'em,' specifying the time frame during which the action occurs.
Em dezembro, o clima tende a ser mais frio no hemisfério norte.
In December, the weather tends to be colder in the northern hemisphere.
In this case, 'dezembro' is part of a time expression, indicating the period at the end of the mentioned month.