A Latin prefix meaning 'equal' or 'equally,' used in words like equidistant and equivalent.
From Latin aequus (equal, level). This ancient root appears in hundreds of English words, having been absorbed through Latin during the Roman period and retained in scientific nomenclature.
When you see 'aequi-' or 'equi-' in a word, you're looking at something claiming fairness or balance: equation (equal statement), equinox (equal night), equity (equal rights). Language itself wanted to teach us about balance.
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