Description:

The phrase 'waj spocu' literally means something like 'as yonder' but in Common is used as an adverbial phrase meaning 'until'. This usage is not from Old Common but seems to be attested from the middle period.

Grammarians grumble about it, but you can say something like 'waj spocu na cel e sin ...' which is somewhat redundant, it means something like 'until such time that'...