At-risk (adjective)

1. Likely to be harmed or affected negatively.
2. Likely to fail or be unsuccessful.

Origin:

The term is a combination of the word "at" and the word "risk".

Examples:

1. At-risk students need extra support.
2. The company's financial stability was at-risk.
3. The species is at-risk of extinction.
4. The bridge was at-risk of collapse.
5. The project was at-risk of not meeting its deadline.