To make or become greater or larger
The act of increasing or rising
upsurge of violence might have been avoided.
Recently there has been an upsurge of dangerous aliens landing on Earth with evil intentions.
It is said to have begun in convents and it had its strongest upsurge in the Great Irish Famine of 1846, where its sales helped alleviate poverty woes.
The upsurge in pet products has made it easier than ever to reveal how much we love our four-legged friends, even to the point of wearing clothes sporting their furry faces.
In Germany, government measures to tighten the reins on healthcare spending have resulted in an upsurge in cheaper imported medicines.