The phrase "putting on ice" can vary in meaning depending on the context. However, some antonyms for this phrase might include "pursuing," "continuing," or "pushing forward." Instead of delaying or temporarily setting aside a task or project, these antonyms suggest actively working towards achieving a goal. "Embracing," "accepting," or "confronting" could also serve as antonyms, as they imply facing challenges head-on rather than avoiding them. Ultimately, the antonyms for "putting on ice" all share a sense of forward momentum and a willingness to take action towards reaching a desired outcome.