His career will be ________ stake if he doesn't perform well.

• Complete Sentence: His career will be at stake if he doesn't perform well.

• at stake (idiom)

English Meaning: If something that is valuable is at stake, it is in a situation where it might be lost.
Bangla Meaning: ঝুঁকির মধ্যে।

Example Sentence:
1. Thousands of lives will be at stake if emergency aid does not arrive in the city soon.
2. The success of the project is at stake, so we need to ensure that every detail is carefully considered.
3. The environmentalists emphasized that the future of the planet is at stake if urgent action is not taken to address climate change.

Source:
1. Cambridge Dictionary.
2. Accessible Dictionary by Bangla Academy.