- "After 1989, peace broke out in the former East Bloc"
erupt or intensify suddenly
- "Unrest erupted in the country"
as of teeth, for example
- "The tooth erupted and had to be extracted"
become active and spew forth lava and rocks; of volcanoes
- "Vesuvius erupts once in a while"
manifest skin eruptions
- "My skin breaks out when I eat strawberries"
- "He broke out in hives"