Part of speech: Noun
a sudden violent entrance; a bursting in
Example: the recent irruption of bad manners
Categories: Entrance, Entering, Entry, Ingress, Incoming
Part of speech: Noun
a sudden sharp increase in the relative numbers of a population
Categories: Population growth
The word "irruption" comes from Latin irruptio, which comes from Middle French irruption.
Roman military conquests permanently planted Latin vocabulary across three continents.