A more thorough explanation:

DAMNOUS

damnous (dam-nəs), adj. Causing loss or damage.

• The hurricane was damnous to the coastal town, causing extensive damage to homes and businesses.
• The company's decision to lay off employees was damnous to the affected workers, causing them to lose their jobs and income.

The term damnous refers to something that causes harm or loss. In the first example, the hurricane is described as damnous because it caused damage to the town. In the second example, the company's decision to lay off employees is damnous because it caused the workers to lose their jobs and income. Both examples illustrate the definition of damnous as something that causes loss or damage.