This is the 19th most frequent Czech word.
až
The Czech word "až" means "until," "as far as," "as late as," or "only when," depending on context.
Here, 'až' is used as a conjunction to indicate a future condition or event.
Půjdu ven, až přestane pršet.
I will go outside when it stops raining.
Here, 'až' is used to indicate a time extent, meaning 'up to' or 'until'.
Pracoval na tom projektu až do noci.
He worked on that project until the night.
In this case, 'až' is utilized to refer to a future time when a specific condition will be met.