to make something dirty, infected, or poisonous again, for a second, third, etc. time

The winter storms release the oil from the boulders and cobbles, recontaminating adjacent wetlands.

Air-dry plates in a rack, so items will not be recontaminated by towels and fingers. 在架子上晾干餐盘，这样餐具就不会被毛巾和手指再次污染。