What is a fancy word for "again"?

A fancy or more sophisticated word for again depends on context and formality. Formal synonyms include once more, once again, anew, afresh, repeatedly, and recurrently. More elegant or literary options include anew, which suggests starting fresh, afresh, which suggests doing something again with renewed energy, encore, which is French for again and used for performances, and de novo, which is Latin used in academic and scientific writing to mean from the beginning again. For repetitive actions, you could use iteratively, again and again, or time and again. For emphasis, you might say yet again, all over again, or as before. In legal and formal documents, words like aforementioned is not a synonym, but phrases like as previously stated or as before are used. Some of the fanciest options are anew, as in we must begin anew, afresh, as in to start afresh, and de novo, as in the experiment was conducted de novo. For everyday fancy speech, once more and once again sound more refined than just again, and phrases like for a second time or on another occasion sound more formal. So instead of saying do it again, you could say do it once more, do it anew, or do it afresh.