The phrase "grease wheels" is an idiomatic expression that means to facilitate or smooth the progress of something. Antonyms for this phrase include "impede," "hinder," "delay," "deter," "hamper," and "obstruct." These antonyms suggest actions that would slow down or prevent progress rather than promote it. For example, a person who is trying to "impede wheels" would be creating obstacles or barriers that would prevent things from moving smoothly. Similarly, someone who is "deteriorating wheels" would be causing damage or wearing down the edges of the mechanism, impeding progress. Overall, antonyms for "grease wheels" indicate actions that interfere with or hinder progress, rather than aiding it.