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ice something up
to cause something to become icy. I hope the cold doesn't ice the roads up. The wind and rain iced up the roads.
to become icy. Are the roads icing up?
1. To become covered with ice: The road has iced up, so be careful.
2. To cause something to become covered with ice: The storm has iced up the bridges. The cold weather iced the pond up, so we decided to go skating.