This is the 895th most frequent Vietnamese word.
tới
"To" or "arrive."
In this sentence, 'tới' is used as a verb meaning 'to arrive' or 'to come to'. It indicates reaching a location (the friend's house)
Tôi sẽ tới nhà bạn vào chiều mai.
I will come to your house tomorrow afternoon.
Here, 'tới' is used as a preposition meaning 'until' or 'to', denoting the endpoint in a range of time.
Cuộc họp kéo dài từ hai giờ tới năm giờ.
The meeting lasts from two o'clock to five o'clock.
In this context, 'tới' conveys 'up to' or the concept of reaching a phase or point in a sequence.