The company executives stonewalled the negotiation by refusing to provide any details during the meeting.

stonewalled 是动词 stonewall 的过去式。stonewall 由 stone（石头）和 wall（墙）组成，字面意思是"石墙"，比喻指"像石墙一样顽固地阻挡或拖延"。在谈判或对话中，stonewall 表示"故意拖延、阻碍进展"的行为。