Etymology
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limpid (adj.)

c. 1600, from French limpide (15c.) and directly from Latin limpidus "clear, transparent" (source also of Spanish límpido, Italian limpido), related to limpor "a clear liquid," limpa "water goddess, water," which is perhaps cognate with lympha "clear liquid" (see lymph). Related: Limpidly.

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limpidity (n.)
1650s, from French limpidité or directly from Late Latin limpiditatem (nominative limpiditas) "clarity, clearness," from Latin limpidus "clear, transparent" (see limpid). Bailey's dictionary (1727) has limpitude.
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