अनिल

Sanskrit nīlī (नीली) meant 'the dark blue one,' from nīla (blue). The word named the indigo plant, Indigofera tinctoria, which had been cultivated in the Indus Valley since at least 2000 BCE. Arab merchants trading along the Indian Ocean adopted the word as al-nīl (النيل), adding the Arabic definite article. When the dye reached medieval Europe through Venetian and Genoese intermediaries, the Arabic form shortened to anil in Portuguese and Spanish.

Portuguese traders established indigo plantations in their Indian colonies — Goa, Daman, and the Malabar Coast — and shipped anil to Lisbon by the ton in the 1500s. The word entered English in the late 1500s as anil or anile, though 'indigo' (from Latin indicum, 'the Indian substance') was always the more common term. Anil survived in technical usage: dyers and chemists knew it as the professional name for the plant extract.

In 1826, the German chemist Otto Unverdorben distilled a coal tar product that he called crystalline. In 1840, Carl Julius Fritzsche treated indigo (anil) with caustic potash and isolated an oily base he named aniline — directly from the Portuguese anil. In 1856, William Henry Perkin, trying to synthesize quinine from aniline, accidentally produced mauveine, the first synthetic dye. The molecule named after the indigo plant became the foundation of the entire synthetic dye and pharmaceutical industries.

The irony is complete. Aniline — named from anil, named from al-nīl, named from nīlī — destroyed the natural indigo trade within decades. Indian indigo plantations collapsed. Bengali farmers who had been forced to grow indigo under British rule (the 'Indigo Revolt' of 1859–1860 was one of India's earliest anticolonial uprisings) were abandoned when synthetic aniline dyes made their crop worthless. The Sanskrit word for blue killed the industry that blue had built.