The action of irrupting or breaking into; a violent entry or invasion; an inbreaking; an intrusion.
An abrupt increase in the size of a movement or organization.
An abrupt increase of an animal population.
A setting about; a beginning.
The initial portion of a syllable, preceding the syllable nucleus.
The beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak.
The initial phase of a disease or condition, in which symptoms first become apparent.