This is the 13th most frequent Portuguese word.
se
"Se" is a Portuguese reflexive pronoun, conjunction, or particle used for impersonal sentences, conditional "if," or reflexive/reciprocal actions.
Here, 'se' is a reflexive pronoun indicating the action performed by the subject reflects back onto itself.
Ele se levantou cedo.
He got up early.
In this sentence, 'se' functions as an impersonal pronoun, indicating that the sentence is in the impersonal form.
Precisa-se de ajuda.
Help is needed.
Here 'se' acts as a conjunction introducing a conditional clause.