Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Tamil நிலா
← Proto-Dravidian *nelanc(c)- (inherited)
← Kolami नेल​ (cognate)
← Malayalam നിലാ (cognate)
← Telugu నెల​ (cognate)

→ Tamil நிலவு (mention)
→ Tamil நிலாவெளிச்சம் (compound)
→ Telugu నెల (cognate)