This is the 770th most frequent Slovenian word.
stranki
"Stranki" in Slovenian means "to the client/customer" or "to the parties," depending on context (dative singular form of "stranka").
In this sentence, 'stranko' (a form of 'stranka') is used to mean 'client', referring to a business context.
Včeraj sem se srečal z novo stranko.
Yesterday, I met a new client.
Here, 'stranki' (a form of 'stranka') refers to a political party, highlighting its organizational meaning.
V tej politični stranki so začeli nove reforme.
In this political party, they have started new reforms.
In this context, 'stranki' refers to a group or assembly of people, showing its social usage.