Negative Connotations:
* The constant criticism undermined her confidence. (Meaning: The criticism weakened her self-assurance)
* The scandal undermined the politician's credibility. (Meaning: The scandal damaged the politician's trustworthiness)
* Their actions undermined the peace agreement. (Meaning: Their actions weakened the chances of a peaceful solution)
* The rumors undermined the company's reputation. (Meaning: The rumors damaged the company's image)
* The faulty foundation undermined the stability of the building. (Meaning: The weak foundation made the building unstable)
Neutral Connotations:
* The new policy undermined the old system. (Meaning: The new policy replaced or made the old system ineffective)
* The research undermined the previous theories. (Meaning: The new research contradicted or disproved the old theories)
* The detective's investigation undermined the initial assumptions. (Meaning: The detective's investigation revealed that the initial ideas about the case were wrong)
Remember: "Undermine" generally implies a negative or weakening effect. It's important to consider the context of your sentence to ensure that you're using the word correctly.