tie in

Verb

• make a logical or causal connection
  • I cannot connect these two pieces of evidence in my mind
    
  • colligate these facts
    
  • I cannot relate these events at all
    

• be in connection with something relevant
  • This ties in closely with his earlier remarks
    

Related words

• Synonyms: 
  associate , relate , link , colligate , link up , connect
• Antonyms: 
  decouple , dissociate