The term 'breaker ice' is a phrase used to describe the process of breaking up large chunks of ice in order to make them easier to move or transport. The crossword solutions for this term are 'PICK', which is a four-letter word. PICK is an action verb that means to take or choose something, usually with the hands. In the context of breaker ice, it refers to the act of using a tool such as a pickaxe to break up the ice into smaller pieces.