Unmistakenly (or unmistakably) is a word used to describe something that is clear, obvious, or certain. Synonyms for this word include words like categorically, undeniably, unequivocally, and unambiguously. Other synonyms for "unmistakenly" include incontestably, indisputably, and without question. When you use these words, you're emphasizing that what you're saying or doing is absolutely correct or evident, without any possibility of doubt or confusion. So, if you're trying to convey that something is beyond dispute or beyond question, using these synonyms for "unmistakenly" can help you get your point across even more effectively.