Lackmus

Etymology
From, from , a compound of the cognates of 🇨🇬 and. The former was later adapted to 🇨🇬, 🇨🇬. It seems obvious that there is a relation between 🇨🇬 and synonymous 🇨🇬 (whence 🇨🇬), but the nature of this relation is unsettled.

Noun

 * 1) litmus dyestuff