When you hear someone say, "I hazarded a guess," you know that they are taking a shot in the dark. They are guessing with little to no confidence in the accuracy of their answer. If you want to express the opposite sentiment of hazarding a guess, you can use several antonyms. To express certainty and confidence, you can say "I accurately predicted," "I confidently stated," or "I precisely knew." These phrases indicate that the speaker has a high degree of confidence in their answer and can back it up with evidence or facts. So, if you want to avoid ambiguity and assert your knowledge, use these antonyms instead of "hazarding a guess.