他扶住摇晃的椅子让它稳定下来。

He held the wobbling chair to ___steady it.

喝了一杯热茶后，她的情绪慢慢稳定下来。

After drinking a cup of hot tea, her emotions started ___steadying.

司机在高速公路上保持车速稳定。

The driver was ___steadying the car's speed on the highway.