spike

To cause a sudden, sharp increase in something.

"The news spiked interest in the new product."

A thin, sharp, pointed piece of metal or wood.

"He hammered a metal spike into the fence."

To secretly add alcohol or a drug to someone's drink or food.

"Someone spiked her drink at the party."

A sudden, sharp increase in amount, value, or intensity.

"There was a sudden spike in electricity prices."