sever

sever    [Sev-er]

verb.  break up (a relationship, tie), separate (a part) from a whole

"On Monday NBCUniversal severed its relationship with Donald Trump following his comments on Mexican immigrants.  On Tuesday, Macy's also severed its relationship with the brash President candidate."
"In baseball, we have seen increasing number of injuries in young pitchers in recent years.  In the past, a doctor may have been telling a pitcher they were going to sever his throwing arm. Pitchers should throw less."
"The family is heartbroken after they found their pet goat's severed head in their garden."