This is the 10922nd most frequent Polish word.
elektroniki
"Elektroniki" means "electronics" in English.
Here, 'elektronikę' (accusative form of 'elektronika') is used as a general term for electronic devices or goods.
Kupuję elektronikę w sklepie.
I am buying electronics in the store.
In this sentence, 'elektronikę' refers to the academic field of electronics, indicating study and theoretical knowledge.
Studiuję elektronikę na uniwersytecie.
I am studying electronics at the university.
Here, 'elektroniką' (instrumental form of 'elektronika') expresses interest or hobby in the general domain of electronics.