back lash

名词 back lash:

1. a movement back from an impact
   同义词：recoil, repercussion, rebound, backlash
2. an adverse reaction to some political or social occurrence
   同义词：backlash

动词 back lash:

1. come back to the originator of an action with an undesired effect
   同义词：backfire, backlash, recoil