The word he used must have been “thaumaturge.” A lifetime ago, when I was learning ancient Greek as an eight-year-old, the textbook the school used liked to remind one of the English words that derived from Greek: “graph” and “graphic” from grapho; “telephone” from phonos; that sort of thing. I will never forget my puzzlement when, in a vocabulary list, it presented the verb thaumazo, offering this helpful thought: “thaumazo, I wonder, or marvel at. This is easily remembered by thinking of the English word ‘thaumaturge.’” And I suppose that was true, since I’ve never forgotten it.
