noun
reproof
ri-PROOF/rɪˈpruːf/
An expression of disapproval intended to correct someone's behavior.
The homeowner's reproof directs the painter's attention to the tracked paint.

Etymology
Reversing the idea of proving worthy gives disapproval or condemnation. Reproof names the resulting act of blame: a rebuke addressed to someone for a fault.
In context
Conversation went on, but in subdued tones, and any unduly lifted voices met with instant reproof.
More examples
- She gives him a look of reproof when he interrupts.
- He accepts the reproof without arguing and apologizes for being late.
- Repeated reproofs do little to change her careless habits.
Forms
reproof · reproofs
reprove verb — Express disapproval to correct someone's behavior.
Similar words
- reprimand
- Usually more formal and delivered by someone in authority.
- rebuke
- Suggests sharper, more forceful disapproval than a gentle reproof.
- admonition
- Emphasizes corrective advice or warning rather than blame.