breach

Noun

• a personal or social separation (as between opposing factions)
  • they hoped to avoid a break in relations
    

• an opening (especially a gap in a dike or fortification)

• a failure to perform some promised act or obligation

Verb

• make an opening or gap in

• act in disregard of laws, rules, contracts, or promises
  • offend all laws of humanity
    
  • violate the basic laws or human civilization
    
  • break a law
    
  • break a promise
    

Related words

• Synonyms: 
  rupture , break , severance , rift , falling out , gap , transgress , offend , infract , violate , go against
• Antonyms: 
  observe , keep