This is the 461st most frequent Czech word.
zároveň
"At the same time" or "simultaneously."
In this sentence, 'zároveň' is a conjunction indicating simultaneity of two actions.
Při studiu jsem zároveň poslouchal hudbu.
While studying, I was also listening to music.
Here, 'zároveň' emphasizes the co-occurrence of two initiatives.
Zároveň s novou prací se rozhodl začít cvičit.
At the same time as starting a new job, he decided to begin exercising.
In this example, 'zároveň' acts as a connector to express that something possesses dual qualities simultaneously.