Stonewall (verb)

1. To delay or obstruct progress, especially by evasive or uncooperative tactics.
2. To refuse to cooperate, answer questions, or give information.
3. To resist or obstruct change or progress.

Origin:

First used as a noun meaning a defensive wall of stone, first recorded in the 16th century, and later used as a verb meaning to delay or obstruct, in the 19th century.

Examples:

1. The government officials stonewalled the investigation by refusing to provide any information.
2. The company stonewalled the merger by refusing to negotiate with the other company.
3. The employee stonewalled the disciplinary action by refusing to answer any questions.
4. The team stonewalled the opposing team's offense by playing a strong defense.
5. He stonewalled the request for a raise by saying he needed to think about it.