This is the 11881st most frequent German word.
till
The German word "till" does not exist as such; it might be a misinterpretation or reference to "tilgen" (to extinguish/pay off) or a borrowing from English ("till" as in "until" or "cash register"). Context is needed for clarification.
Here, 'bis' (till) is used as a conjunction indicating a time point until which the action takes place.
Ich warte auf dich, bis du ankommst.
I will wait for you till you arrive.
In this sentence, 'bis' serves as a coordinating conjunction setting a condition for the action.
Wir können nicht anfangen, bis alle hier sind.
We cannot start till everyone is here.
Here, 'bis' is used as a preposition specifying the endpoint of the described duration.