Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Tongan
vaka
←
Proto-Polynesian
*waka
(derived)
→
Marshallese
wa
(cognate)
→
Samoan
va'a
(cognate)