「絶対に」(ぜったいに) is an adverb used to emphasize certainty, meaning "absolutely," "definitely," or "without fail." It can express strong determination or give a strong command/prohibition. It often accompanies verbs to reinforce the action or inaction. Example: 約束は絶対に守ります。 (I will absolutely keep my promise.)

疑いの余地なく、必ずそうであること。