step-up

名词 step-up:

1. the act of increasing something
   同义词：increase

动词 step-up:

1. increase in extent or intensity
   同义词：escalate, intensify, step up
2. speed up
   同义词：rev up, step up
3. make oneself visible; take action
   同义词：come to the fore, step forward, come forward, step up, step to the fore, come out