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ETYMOLOGY DICTIONARY
- late 14c., "steadfast, resolute," from O.Fr. constant (14c.) or directly from L. constantem (nom. constans) "standing firm, stable, steadfast, faithful," prp. of constare, from com- "together" (see com-) + stare "to stand," from PIE root *sta- "to stand" (see stet). Of actions and conditions from 1650s. The noun is attested from 1832 in mathematics and physics. Related: Constantly.
- Turkish name of Constantinople, a corruption of Greek phrase eis tan (ten) polin "into the city," which is how the local Greek population referred to it. Picked up in Turkish 16c., though Turkish folk etymology traces the name to Islam bol "plenty of Islam." Gk. polis "city" has been adopted into Turkish as a place-name suffix as -bolu.
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