noun
disservice
dis-SUR-vis/dɪsˈsɜːrvɪs/
An action that harms someone or something.
Overwatering the plant does its owner a disservice.

Etymology
Here dis- reverses service in its sense of helpful action. A disservice produces harm rather than benefit, so even something intended to help can be a disservice.
In context
We do a great disservice to boys on how we raise them; we stifle the humanity of boys.
More examples
- The misleading summary was a disservice to readers.
- She did herself a disservice by refusing to explain.
- The inaccurate film did a disservice to its subject.
Forms
disservice