All iffiness antonyms

noun iffiness

• certainty — Certainty is the state of being definite or of having no doubts at all about something.
• sureness — free from doubt as to the reliability, character, action, etc., of something: to be sure of one's data.
• decisiveness — having the power or quality of deciding; putting an end to controversy; crucial or most important: Your argument was the decisive one.