必定 (bì dìng): to be bound to; to be sure to

He practices for three hours every day; he is bound to get a good result in this competition.

If it pours again tomorrow, the mountain road is bound to collapse; we absolutely must not risk setting out.

As long as you take your medicine on time and rest well, your condition is bound to improve; there's no need to worry too much.

He is so smart and hardworking that he is bound to pass this exam; we all have great confidence in him.

If the company doesn't change its business strategy, it is bound to fail in the competition, so we must adjust as soon as possible.