This is the 3rd most frequent Slovenian word.
se
The Slovenian word "se" is a reflexive pronoun meaning "oneself" or a particle used to indicate reflexive actions or emphasis in various contexts.
Here, 'se' serves to emphasize the reciprocal or reflexive nature of the action attributed to the master.
Vaja dela mojstra, če se mojster dela vaje.
Practice makes perfect if the master practices.
In this sentence, 'se' is used as a reflexive pronoun in a polite form of greeting.
Kako se imate?
How are you doing?
In this usage, 'se' reflects the mutual action of seeing each other among the subjects.