Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Japanese
直ぐに
←
Proto-Japonic
*sunku
(inherited)
←
Miyako
直ぐ
(cognate)
←
Yaeyama
直ぐ
(cognate)
←
Yonaguni
直く゚
(cognate)