discontinue

(verb) put an end to a state or an activity. Synonyms: stop, cease, give up, quit, lay off. Examples: "Quit teasing your little brother."

(verb) come to or be at an end. Examples: "The support from our sponsoring agency will discontinue after march 31."

(verb) prevent completion. Synonyms: break, break off, stop. Examples: "Stop the project." "Break off the negotiations."