This is the 17684th most frequent Polish word.
zmiennik
"Zmiennik" in English means "substitute" or "replacement."
Here 'zmiennik' is used to denote a person who temporarily replaces someone in their duties or tasks.
Zmiennik przejął jego obowiązki podczas jego nieobecności.
The substitute took over his duties during his absence.
In this sentence, 'zmiennik' refers to a stand-in or person designated to perform certain actions on behalf of the actor during filming.
Aktor miał zmiennika, który występował za niego w trudnych scenach.
The actor had a stand-in who performed for him in challenging scenes.
Here 'zmiennik' is used to describe a backup player who is ready to replace the main player as needed.