déconsidérer

A fairly formal, literary verb meaning to discredit or bring someone/something into disrepute — damaging their reputation or standing. More elevated in register than the everyday discréditer, though close in meaning.

• Ce scandale a déconsidéré l'ensemble de l'institution. — This scandal discredited the entire institution.
• Il craint que cette décision ne le déconsidère auprès de ses collègues. — He's worried this decision might damage his standing with his colleagues.
• Une telle attitude finit par déconsidérer toute une profession. — That kind of attitude ends up bringing an entire profession into disrepute.

Closer in register to discréditer than to a casual put-down — it belongs in formal or written French about reputation and standing, not in ordinary insults.

Often confused with discréditer.