Retard and Speed up


Retard verb - To cause to move or proceed at a less rapid pace.
Usage example: an herbicide to retard the growth of weeds

Speed up is an antonym for retard in slow down topic.

Speed up

Speed up verb - To cause to move or proceed fast or faster.
Usage example: we have to speed up production if we are ever going to make the deadline

Retard is an antonym for speed up in topics: hurry, act, timing, make happen faster.
Cite this Source
Speed up and Retard. (2016). Retrieved 2023, March 27, from
Retard & Speed up. N.p., 2016. Web. 27 Mar. 2023. <>.
Speed up or Retard. 2016. Accessed March 27, 2023.
Google Ngram Viewer shows how "retard" and "speed up" have occurred on timeline