This is the 14983rd most frequent German word.
schneien
"Schneien" means "to snow."
In this sentence, 'schneien' is used as a verb indicating the weather phenomenon of snow falling from the sky.
Es beginnt heute früh zu schneien.
It is starting to snow early today.
Here, 'schneien' is used in its past participle 'geschneit' to describe a completed snow event.
Letztes Jahr hat es viel geschneit.
Last year, it snowed a lot.
In this case, 'schneien' is used in its present tense subjunctive mood to express a conditional scenario.