"Hem haw" is a colloquial term that means to hesitate or waste time. The antonyms for "hem haw" include words that denote quick or decisive actions, such as immediate, unhesitating, outspoken, confident, and resolute. These words represent the opposite of "hem haw," which suggests indecisiveness or reluctance to act. Other antonyms that convey a similar sense of urgency are words like forceful, assertive, determined, or steadfast. When we use these antonyms in our speech or writing, we can avoid "hem hawing" and show that we have a clear and definite plan of action.