Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Telugu ఏడు
← Proto-Dravidian *ēr̤u (inherited)

→ Tamil ஏழு (cognate)
→ Tamil யாண்டு (cognate)
→ Telugu ఏడాది (compound)
→ Telugu ఏడుగురు (suffix)
→ Telugu పదియేడు (compound)
→ Telugu ఈరేడు (compound)