decelerate

"My friend told me there was something in the box, but I didn't know what it was yet. "

"The dog cautiously approached the sleeping cat. "

"The car's velocity changed from 30 mph east to 40 mph west, demonstrating a change in direction. "

"The driver of the school bus carefully navigated the busy streets. "

"My grandmother takes several medications for her high blood pressure. "

"Growth was dampened by a softening of the global economy in 2001, but picked up in the subsequent years due to strong growth in China."

"The doctor prescribed aspirin."

"If you still feel unwell tomorrow, see your doctor."

"the advancement of learning"

"to reduce weight, speed, heat, expenses, price, personnel etc."

"The tomato plants had some kind of disease that left their leaves splotchy and fruit withered."

"a slow train;  a slow computer"