implode          
verb [ I ] uk/ɪmˈpləʊd/ us/ɪmˈploʊd/
 physics specialized向心压挤;内爆 
to fall towards the inside with force
  The vacuum inside the tube caused it to implode when the external air pressure was increased. 随着外部气压的增强,管内真空使管中发生内爆。 
 Compare: explode (BREAK APART)
  崩溃;垮塌
to fail suddenly and completely and be unable to operate
  Their economy is in danger of imploding. 他们的经济有崩溃的危险。