This is the 15th most frequent French word.
se
"Se" is a reflexive pronoun meaning "oneself," "himself," "herself," "itself," or "themselves," used with reflexive verbs.
The word 'se' in this sentence indicates a reflexive action performed by the subject (Marie) on herself.
Marie se prépare pour le travail.
Marie is getting ready for work.
Here, 'se' is part of a reflexive verb, indicating a general or impersonal subject's action.
Lorsqu'il faisait noir, on ne pouvait pas se repérer facilement.
When it was dark, one couldn’t easily locate themselves.
In this sentence, 'se' denotes a reciprocal action occurring between the members of the group (ils).