spurt
n.n. a sudden, short burst of activity or growth. You use this when something happens very quickly for a short time.
n. a sudden, brief period of rapid growth or activity. Often used to describe a temporary increase in speed, intensity, or volume.
There was a sudden spurt of growth in the company's sales.
The athlete experienced a final spurt of energy during the last minute of the race to win the gold medal.
Economists noted a brief spurt of inflation following the new tax policy, though they expected prices to stabilize within the next fiscal quarter.
From earlier spirt, sprit (“to sprout”), from Middle English sprytten, from Old English spryttan, from Proto-West Germanic spruttjan, ultimately from Proto-Indo-European (s)per- (“to strew, sow, sprinkle”).
Uncertain. May be derived from Etymology 1.