The phrase "cut ice" refers to doing something that is challenging or difficult. Its antonyms are words that describe things that are easy or effortless. Some antonyms for "cut ice" could be "walk in the park," "breeze through," "piece of cake," or "child's play." These words imply that the task at hand is not complicated or requires minimal effort, and can be completed easily without any difficulty. The antonyms for "cut ice" can be used to describe activities that are not daunting, complex, or challenging, and can be accomplished without much effort or stress.