Their marriage is an unhappy one, as his obsessive-compulsive behaviors escalate and he infects her with his fear of death.

Equally disturbing, parental behavior has escalated beyond the emotional abuse of children to physical violence.

But if left unchecked, antisocial behaviour can escalate into something more serious.

Violent behavior often begins with verbal threats but over time escalates to involve physical harm.

The behavior escalated, she said.

As time goes on, this behavior escalates to encapsulate the healthy and the easily treated.

The negative behavior escalates when Lucas rescues a young girl from drowning during a town festival, but is met with accusations of molestation.

But as alcoholics got sober the codependent behaviors of their families often continued and sometimes even escalated.

Mr. Mobley's behavior in school, never good, escalated to fistfights.

Nearly half the travel workers said they had seen a situation where discourteous behavior had almost escalated into physical confrontation.