A tool, instrument, or person that shapes things into wedges; something that creates wedge shapes.
From Latin 'cuneus' (wedge) plus the agent suffix '-ator,' meaning 'one who makes or does,' following classical Latin word-formation patterns.
Agent nouns with '-ator' are powerful in English—they turn verbs into people or tools (like 'educator' or 'percolator'), and 'cuneator' is a delightfully obscure example!
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