Definitions:

1. Refers to the process where a layer of ice forms or builds up on a surface, typically as a result of extremely cold temperatures or freezing conditions. VERB
   • The lake iced up overnight, providing a perfect skating surface.
2. To become covered with ice. VERB
   • The car's windshield iced up overnight, making it hard to drive in the morning.
3. To become stiff, unresponsive, or emotionally cold. VERB
   • After the argument, she iced up and refused to speak to him.
4. To freeze and become inoperable. VERB
   • The pipes in the cabin iced up during the winter storm, cutting off the water supply.

Synonyms:

• freeze
• freeze over
• frost over
• glaciate
• ice over
• solidify