Centre

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late Middle English: from Old French, or from Latin centrum, from Greek kentron ‘sharp point, stationary point of a pair of compasses’, related to kentein ‘to prick’.

wiktionary

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Borrowed from Middle French centre, from Latin centrum, from Ancient Greek κέντρον(kéntron), from κεντεῖν(kenteîn, “to prick, goad”).

etymonline

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centre

chiefly British English spelling of center (q.v.); for ending, see -re.