直至 (zhí zhì): kéo dài cho đến khi

He practiced the piano every day, not stopping until late at night.

The heavy rain lasted for three days, not letting up until the morning of the fourth day.

She waited at the station until the last train departed, and only then left in disappointment.

The two sides negotiated for hours on end, not reaching an agreement until two in the morning.

He revised his thesis repeatedly until his advisor was satisfied.