Detrimental (adjective)

1. Causing harm or damage.
2. Having a negative or detrimental effect.

Origin:

From latin dētrīmentālis, from dētrīmentum ("loss, injury"), from detrahere ("to take away"), from de- ("away") + trahere ("to draw").

Examples:

1. The constant noise was detrimental to the students' concentration.
2. His lack of education was detrimental to finding a good job.
3. Smoking is detrimental to one's health.
4. The company's financial troubles were detrimental to the employees.
5. The delay in treatment was detrimental to the patient's health.