Discreditable (adjective)

Bringing discredit or shame; damaging to one's reputation.

Origin:

From the latin word 'discredere' meaning 'to believe no more'.

Examples:

1. The revelation of the scandal was highly discreditable to the former political leader.
2. The discreditable behavior of the athlete was a source of disappointment for fans.
3. The discreditable actions of the company led to widespread public anger and a loss of business.
4. The discreditable performance of the team was a result of poor preparation and lack of effort.
5. The discreditable behavior of the employee was cause for termination.