i Register
In some senses, til is marked as colloquial. Watch for register when choosing this word.
ADJ.
ancient, good
We waited til the ancient temple finally opened its doors to visitors.
VERB + TIL
gone, wait, working
I'll wait til the rain stops before I head home.
TIL + NOUN
night, scientists
We worked til night finishing the project before the deadline.
PREP.
from, in, up
We waited in the airport til our flight was called.