Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Tocharian A wak
← Proto-Indo-European *wekʷ- (derived)
← Tocharian B wek (cognate)

→ Ancient Greek ὄψ (cognate)
→ Tocharian B wek (cognate)
→ Tocharian A vak (mention)