1
Stage 1 of 4
indikon
Greek · ancient
"the Indian dye"
literally "the Indian [dye]", from the source of the blue dye
2
Stage 2 of 4
indicum
Latin · ancient
"indigo dye"
adopted through Roman trade with South Asia
3
Stage 3 of 4
indigo
Spanish/Portuguese · medieval
"indigo dye"
spread through Iberian trade networks
4
Stage 4 of 4
indigo
English · 1500s-1600s
"a deep blue dye or color"
settled as the English name for the blue dye and color
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